# data[].attributes.titles[].title
Condensation-induced roughness controls non-contact bouncing of hot drops

# data[].attributes.descriptions[].description
Droplets readily bounce on hydrophobic microtextures as they trap an air layer between liquid and solid, limiting contact to the structure tops and thereby reducing adhesion and pinning. For hot droplets condensation can fill the texture, forming liquid bridges that limit or prevent bouncing. Remarkably, bouncing can also occur on hydrophilic or wet surfaces when a thin gas layer dynamically cushions the droplet impact without any contact with the substrate. In this non-contact regime, the interplay between hot-droplet impacts, condensation, and the transient gas cushion remains to be clarified. Here, we investigate the impact of hot water droplets on lubricant-infused surfaces initially at room temperature. Using high-speed imaging and interferometry, we discover that the maximum contactless bouncing velocity decreases with increasing temperature difference ∆T between the drop and the surface. High-speed interferometry reveals that the transition is governed by rapid condensation growth (~ 1 ms) on the lubricant layer, which generates a liquid roughness that triggers the contact between the droplet and the substrate. This phenomenon vanishes for hot silicone oil droplets due to their low volatility. We develop a minimal model coupling condensation dynamics and thermal transfer, leading to a scaling law that quantitatively predicts both the critical bouncing velocity and the condensation bridging time. The model shows that the transition depends on ΔT and the substrate thermal properties, providing a predictive framework for hot-drop impacts in the non-contact bouncing regime.

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.titles[].title
Shift Current Conductivity in Monolayer SnS: A Tight-Binding Analysis

# data[].attributes.descriptions[].description
We investigate the bulk photovoltaic effect in monolayer SnS using an effective tight-binding model derived from first-principles calculations. By comparing short-range and long-range hopping models, we show that the essential features of the shift current conductivity are captured by a minimal model. The shift current is decomposed into transition intensity and shift vector, enabling identification of dominant interband transitions. The comparison reveals that long-range hopping processes quantitatively modify the peak positions and magnitudes, while the short-range model retains the characteristic low-energy structure of the nonlinear response. Our findings provide a transparent framework for understanding and designing bulk photovoltaic effects in two-dimensional materials.

# data[].attributes.sources[].title
Journal of the Physical Society of Japan

# data[].attributes.fundings[].funder_name
Japan Science and Technology Corporation

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.descriptions[].description
Precise patterning of small-molecule semiconductive crystals without external chemical additives remains a significant challenge. Herein, we design and synthesize intrinsic photo-crosslinkable semiconductive small-molecule crystals (i-PSSCs) by associating [1]benzothieno[3,2-b]benzothiophene core with diacetylene-ended groups. The i-PSSCs undergo self-crosslinking directly upon ultraviolet light irradiation to yield micron-scale patterned crystalline films through a combination of photo-crosslinking and solvent rinsing. The molecular packing remains intact before and after patterning. Therefore, the electrical performance of the organic thin-film transistors fabricated from both pristine and patterned i-PSSCs films show minimal difference, with maximum field-effect mobilities of 0.46 and 0.25 cm² V-¹ s-¹, respectively. Moreover, the i-PSSCs in a transistor array exhibit high sensitivity and selective response to ultraviolet patterns, enabling bio-inspired vision systems that mimic human retinal extraction of image descriptors. This work offers a valuable strategy for developing i-PSSCs for UV-selective artificial vision applications.

# data[].attributes.filesets[].filename
Advanced Science - 2025 - Li - Intrinsic Photo‐Crosslinkable Semiconductive Small‐Molecule Crystals i‐PSSCs for.pdf

# data[].attributes.thumbnail.filename
Advanced Science - 2025 - Li - Intrinsic Photo‐Crosslinkable Semiconductive Small‐Molecule Crystals i‐PSSCs for.pdf

# data[].attributes.titles[].title
Interplay among spin, orbital, and lattice degrees of freedom in the magnetocaloric compound
                    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
                      <mml:mrow>
                        <mml:mi>Ho</mml:mi>
                        <mml:msub>
                          <mml:mi mathvariant="normal">B</mml:mi>
                          <mml:mn>2</mml:mn>
                        </mml:msub>
                      </mml:mrow>
                    </mml:math>

# data[].attributes.descriptions[].description
We have investigated the magnetic orderings, crystal lattice distortion and spin dynamics in
magnetocaloric material HoB2, by using neutron diffraction, x-ray diffraction experiments and AC
susceptibility measurements. Although HoB2 exhibits the ferromagnetic phase transition at T1=15 K, the other phase transition at T2=11 K has not been elucidated so far. In the present high resolution powder neutron diffraction and single crystal x-ray diffraction experiments, we observed the crystal structure phase transition from hexagonal (P6/mmm) to monoclinic (C2/m) at T2. The structure change concomitantly occurs with change in the moment size and fixing the spin orientation angle of Ho3+ moments below T2. Analyzing the structure distortion mode coupled to spin direction, we found that the ferromagnetically ordered moments is in the hexagonal (x, -x, z)-plane. In the AC susceptibility measurements, we observed a large enhancement in the susceptibility along the ab-plane for T2 < T < T1, indicating that the ferromagnetic state in the intermediate temperature region is characterized by large spin fluctuations. 

# data[].attributes.fundings[].funder_name
Japan Proton Accelerator Research Complex

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
High Energy Accelerator Research Organization

# data[].attributes.titles[].title
マイクロニードルピーニング法（MNP）による リサイクル鋼板レーザ溶接継手の疲労強度の向上

# data[].attributes.titles[].title
mprovement of fatigue strength of laser welded joints in recycled steel sheets  by micro needle peening (MNP)

# data[].attributes.descriptions[].description
溶接継手の疲労強度を向上させる技術として，先端半径の小さいピンを溶接部に直接打痕するマイクロニードルピーニング（Micro Needle Peenimg : MNP）が開発されている．MNPは高周波機械打撃の一種で安価で簡便な方法である．本研究では1180MPaリサイクル鋼のレーザ溶接継手に対して，レーザ溶接部にMNP 処理を施し，疲労特性を評価した．その結果，以下を明らかにした．MNPにより継手の疲労強度は母材同等までは到達しないもの，母材に対する溶接継手の疲労限の強度比（σw,MNP=390MPa / σw,base=450MPa）を87%まで著しく向上させることに成功した．詳細な破面観察により，レーザ入力側の裏面に存在する深さ100μm程度の溶接欠陥が，MNPより局所的な塑性流動により潰され無害化されることが裏付けられた．そのため，疲労強度の向上が実現したと推察される．

# data[].attributes.creators[].department
構造材料研究センター/材料評価分野/極低温疲労グループ

# data[].attributes.creators[].department
構造材料研究センター/材料評価分野/極低温疲労グループ

# data[].attributes.subjects[].subject
マイクロニードルピーニング

# data[].attributes.rights[].description
  - 非営利目的のみ利用可
  - 改変禁止

# data[].attributes.conference.name
日本材料学会第75期学術講演会

# data[].attributes.filesets[].filename
マイクロニードルピーニング法（MNP）によるリサイクル鋼板レーザ溶接継手の疲労強度の向上1015.doc

# data[].attributes.thumbnail.filename
マイクロニードルピーニング法（MNP）によるリサイクル鋼板レーザ溶接継手の疲労強度の向上1015.doc

# data[].attributes.titles[].title
Bottom‐Up Assembly of Amorphous Metal–Organic Frameworks From Proton Conductive Metal–Organic Polyhedra

# data[].attributes.descriptions[].description
While crystalline metal–organic frameworks (MOFs) benefit from precise structural programmability, achieving comparable control in amorphous MOFs (aMOFs) remains underexplored. Most reported aMOFs are obtained via top-down amorphization of crystalline frameworks, whereas the limited bottom-up approaches typically rely on linker substitution-based assembly that inherently restricts node-level functionalization. Here, we present a bottom-up strategy for constructing proton-conductive aMOFs using sulfonate-rich metal–organic polyhedra (MOPs) as predesigned molecular building units. Discrete Rh-based MOPs with accessible axial coordination sites are crosslinked with flexible ditopic linkers to form extended amorphous networks while preserving intrinsic node functionality. Variation of linker identity modulates network connectivity, free volume, water stability, and proton transport behavior. Retention of the sulfonate group from the MOP building units affords aMOFs with proton conductivities of up to 4.8 mS cm−1 at 85°C and 90% relative humidity, with a low activation energy of 0.20 eV, whereas the sulfonate-free aMOF analog exhibits insulating behavior. These results establish a general strategy for the rational design of functionally programmable aMOFs using chemically predefined building units.

# data[].attributes.fundings[].funder_name
Iketani Science and Technology Foundation

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.filesets[].filename
Small - 2026 - Ma - Bottom‐Up Assembly of Amorphous Metal Organic Frameworks From Proton Conductive Metal Organic Polyhedra (2).pdf

# data[].attributes.thumbnail.filename
Small - 2026 - Ma - Bottom‐Up Assembly of Amorphous Metal Organic Frameworks From Proton Conductive Metal Organic Polyhedra (2).pdf

# data[].attributes.titles[].title
Non-Hermitian corner skin effect in a two-dimensional photonic crystal

# data[].attributes.descriptions[].description
We numerically study topological effects of electromagnetic (EM) waves in a two-dimensional non-Hermitian photonic crystal composed of lossy magneto-optical materials. In this system, not only the EM wave functions but also the complex eigenfrequencies exhibit nontrivial topological properties. We demonstrate that the non-Hermitian skin effect, protected by point gaps in the complex eigenfrequency spectrum, emerges at both the edges and corners of truncated structures. This phenomenon has no counterpart in Hermitian systems. In addition, we identify non-Hermitian topological edge states originating from the nontrivial topology of the bulk bands. While most previous studies of non-Hermitian topology have focused on tight-binding models, our work addresses a continuous photonic system, providing a more realistic platform and offering a concrete route toward experimental realization of non-Hermitian effects.

# data[].attributes.fundings[].funder_name
Japan Science and Technology Corporation

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.titles[].title
Viscous Hall effect in graphene superlattice enabled via proximity screening

# data[].attributes.descriptions[].description
In electronic systems with strong electron-electron interactions, charge carriers can exhibit fluidlike behavior governed by viscosity. While such hydrodynamic regimes have been observed in pristine graphene, realizing similar behavior in moiré superlattices has been challenging due to enhanced momentum-relaxing umklapp electron-electron scattering. Here, we show that placing a graphene/hBN superlattice in close proximity to a conductive screening layer suppresses umklapp momentum relaxation, creating favorable conditions for the observation of viscous electron flow. The hydrodynamic response near the first Dirac point remains largely insensitive to the moiré potential, allowing clear observation of the viscous Hall effect and extraction of the electron-electron scattering length. These results identify proximity screening as a practical route to tune scattering processes and enable quantitative measurement of electron viscosity in moiré superlattices. In contrast, transport near the secondary Dirac points is strongly affected by narrow bandwidth, which hinders reliable measurements of the viscous Hall effect in this regime. This limitation highlights the need for multicomponent hydrodynamic frameworks to describe narrow-bandwidth moiré systems.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.fundings[].funder_name
Ministry of Science and ICT, South Korea

# data[].attributes.fundings[].funder_name
Ministry of Science and ICT, South Korea

# data[].attributes.fundings[].funder_name
Ministry of Science and ICT, South Korea

# data[].attributes.fundings[].funder_name
Ministry of Science and ICT, South Korea

# data[].attributes.fundings[].funder_name
Natural Science Foundation of Zhejiang Province

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Science and Technology Corporation

# data[].attributes.fundings[].funder_name
Ministry of Education, Culture, Sports, Science and Technology

# data[].attributes.descriptions[].description
In moiré materials, excitons serve as optical probes because of the sensitivity to both valley-dependent electronic structure and many-body excitonic interactions. For angle-tuned twisted bilayers, lattice reconstruction becomes significant at marginal twist angles, raising interesting questions about the optical characteristics of excitons both in the steady-state and nonequilibrium regimes. In this work, we investigate both the steady-state and the ultrafast transient exciton behaviors in a twisted WSe2 homobilayer (t-WSe2) using reflection contrast, polarization-resolved photoluminescence, and ultrafast pump–probe spectroscopy. We report the emergence of two distinct intralayer excitons in the lattice reconstructed t-WSe2, which are used to probe local electronic asymmetries and interlayer coupling in moiré domains. These excitons possess distinct temperature- and doping-dependent valley coherence and population dynamics, arising from the asymmetric interlayer coupling. Theoretical modeling via the Lindblad master equation highlights that the pure dephasing rate increases with hole doping, attributed to the enhanced electron-hole interactions. Ultrafast degenerate pump-probe spectroscopy reveals distinct fast decaying dynamics (<1 ps) for the two intralayer excitonic absorption species, 𝑋1 and 𝑋2, where the asymmetric interlayer coupling contributes more to the faster 𝑋1 decay than 𝑋2. Optical-pump and white-light probe spectroscopy further unveils a biexponential decay, where the fast component (𝜏fast≈0.7–0.9ps) signifies rapid radiative recombination with repopulation effects in the optical light cone. The slow component (𝜏slow≈100–300ps) is linked to exciton-phonon scattering and population relaxation via interlayer breathing phonons. We also present that intervalley scattering pathways, i.e., mediated by the 𝐾⁢𝑄 transitions, are distinct from the monolayer counterpart. This work provides detailed insights into the exciton population dynamics in twisted homobilayers, highlighting the role of intervalley and exciton-phonon interactions in the transient multiple exciton complex behaviors.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.fundings[].funder_name
Guelph Research and Development Centre, Agriculture and Agri-Food Canada

# data[].attributes.fundings[].funder_name
Ministry of Science and ICT, South Korea

# data[].attributes.fundings[].funder_name
Ministry of Science and ICT, South Korea

# data[].attributes.titles[].title
Symmetry broken states at high displacement fields in ABA trilayer graphene

# data[].attributes.descriptions[].description
We present a comprehensive study of magnetotransport in high-mobility trilayer graphene (TLG) devices under a transverse displacement field, focusing on symmetry-broken Landau levels (LLs) from monolayer-like and bilayer-like bands. A striking displacement-field-induced enhancement of the Landé 𝑔-factor is observed in the zeroth Landau level of the monolayer-like band, highlighting the formation of interaction-driven quantum Hall states. Additionally, we find a rich landscape of LL crossings in the Dirac gully region, accompanied by phase transitions between spin-, gully, and valley-polarized LLs. These experimental observations are successfully modeled using calculations based on optimized tight-binding parameters. Furthermore, our results reveal significant particle-hole asymmetry in the sequence of LLs in the Dirac gullies, attributed to differing 𝑔-factor values for electrons and holes. This asymmetry underscores the limitations of noninteracting models in capturing the complexities of multiband systems. This work provides insights into the interplay of symmetry-breaking mechanisms and enhanced interaction effects in Bernal-stacked trilayer graphene, advancing our understanding of quantum transport phenomena in multiband systems.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.fundings[].funder_name
U.S. Army Combat Capabilities Development Command

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.titles[].title
Electric-Field-Tunable Spin–Orbit Gap in a Bilayer Graphene/WSe₂ Quantum Dot

# data[].attributes.descriptions[].description
We report on the investigation of proximity-induced spin–orbit coupling (SOC) in a heterostructure of bilayer graphene (BLG) and tungsten diselenide (WSe2). A BLG quantum dot (QD) in the few-particle regime acts as a sensitive probe for induced SOC. Finite bias and magnetotransport spectroscopy measurements reveal a significantly enhanced SOC that decreases with the applied displacement field, distinguishing it from pristine BLG. Furthermore, our measurements demonstrate a reduced valley g factor at larger displacement fields, consistent with weaker lateral confinement of the QD. Our findings show evidence of the influence of WSe2 across BLG layers, driven by reduced real-space confinement and increased layer localization of the QD states on the BLG layer distant to the WSe2 at higher displacement fields. This study demonstrates the electrostatic tunability of the spin–orbit gap in BLG/WSe2 heterostructures, which is especially relevant for the field of spintronics and future spin qubit control in BLG QDs.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.rights[].description
This document is the Accepted Manuscript version of a Published Article that appeared in final form in Nano Letters, copyright © 2025 American Chemical Society. To access the final published article, see https://doi.org/10.1021/acs.nanolett.5c02229.

# data[].attributes.fundings[].funder_name
Ministry of Education, Culture, Sports, Science and Technology

# data[].attributes.fundings[].funder_name
Core Research for Evolutional Science and Technology

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.titles[].title
Edge dependence of the supercurrent in the quantum Hall regime

# data[].attributes.descriptions[].description
The observation of Josephson current in the quantum Hall regime has attracted considerable attention, revealing the coexistence of two seemingly incompatible phases: the quantum Hall and superconducting states. However, the mechanism underlying the Josephson current remains unclear because of the observed ℎ⁡/2⁢𝑒 magnetic interference period and the absence of precisely quantized Hall plateaus. To address this issue, we investigate the edge dependence of the Josephson current in graphene Josephson junctions operating in the quantum Hall regime. By systematically comparing devices with native, etched, edge-free, and gate-defined edges, we demonstrate that the Josephson current is confined to the physical edges and is highly sensitive to specific edge configurations. Our findings provide direct evidence that counter-propagating quantum Hall edge states mediate Andreev bound states, enabling Josephson coupling. These results clarify the underlying mechanism of Josephson current in the quantum Hall regime and offer new strategies for engineering superconducting hybrid devices.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.fundings[].funder_name
Samsung Science and Technology Foundation

# data[].attributes.fundings[].funder_name
Samsung Science and Technology Foundation

# data[].attributes.titles[].title
Switchable Chern Insulators and Competing Quantum Phases in Rhombohedral Graphene Moiré Superlattices

# data[].attributes.descriptions[].description
Graphene-based moiré superlattices provide a versatile platform for exploring novel correlated and topological electronic states, driven by enhanced Coulomb interactions within flat bands. The intrinsic tunability of graphene’s multiple degrees of freedom enables precise control over these complex quantum phases. In this study, we observe a range of competing phases and their transitions in rhombohedral stacked hexalayer graphene on hexagonal boron nitride (𝑟−6⁢G⁡/hBN) moiré superlattices. When electrons are polarized away from the moiré superlattice, we first identify a Chern insulator with reversible Chern numbers at 𝑣=1 (one electron per moiré cell), revealing a competition between bulk and edge orbital magnetization. At 𝑣=2, three distinct insulating phases—spin-antiferromagnetic, spin-polarized, and valley-polarized—emerge under vertical displacement field 𝐷 and magnetic field 𝐵⊥, governed by hierarchical isospin symmetry breaking. Furthermore, charge density wave (CDW) states at 𝜈=1/3 and 2/3, along with a magnetic-field-induced stripe phase at 𝜈=1/2, demonstrate tunable correlated orders at fractional fillings. Our findings reveal a rich interplay of charge, isospin, topology, and magnetic field in rhombohedral graphene moiré superlattices.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.fundings[].funder_name
Ministry of Education, Culture, Sports, Science and Technology

# data[].attributes.fundings[].funder_name
National Natural Science Foundation of China

# data[].attributes.fundings[].funder_name
National Natural Science Foundation of China

# data[].attributes.fundings[].funder_name
National Natural Science Foundation of China

# data[].attributes.fundings[].funder_name
National Key Research and Development Program of China

# data[].attributes.fundings[].funder_name
National Key Research and Development Program of China

# data[].attributes.fundings[].funder_name
Science and Technology Innovation Plan Of Shanghai Science and Technology Commission

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.filesets[].filename
2025A01367G_LD19798 - Switchable Chern insulators and competing quantum phases in rhombohedral graphene moire superlattices-Latest Version.pdf

# data[].attributes.thumbnail.filename
2025A01367G_LD19798 - Switchable Chern insulators and competing quantum phases in rhombohedral graphene moire superlattices-Latest Version.pdf

# data[].attributes.titles[].title
Effects of Landau Level Mixing on Various Fractional Quantum Hall States in Trilayer Graphene

# data[].attributes.descriptions[].description
We present a detailed experimental study of the effect of Landau level mixing on various FQHs about half filling in a multiband system, namely Bernal stacked trilayer graphene. In pristine TLG, the excitation energy gaps, Landé g-factor, effective mass, and disorder broadening of the odd-denominator FQH states are identical to their hole-conjugate counterpart. This precise PH symmetry stems from the lattice mirror symmetry that precludes Landau-level mixing. Introducing a non-zero displacement field D disrupts this mirror symmetry, facilitating the hybridization between the monolayer-like and bilayer-like Landau levels. This inter-band coupling enhances the Landau level mixing factor η and activates three-body interactions – both of which explicitly break the PHS of FQHs. As a result, various conventional FQHs are completely destabilized, offering a route to explore such mixing effects on FQHs in a controlled way. We establish that the PHS breaking in TLG is of extrinsic origin and is fundamentally distinct from the intrinsic, interaction-driven symmetry breaking observed in the lowest Landau levels of single-layer and bilayer graphene.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.fundings[].funder_name
U.S. Army Combat Capabilities Development Command

# data[].attributes.fundings[].funder_name
Department of Science and Technology, Ministry of Science and Technology, India

# data[].attributes.fundings[].funder_name
Department of Science and Technology, Ministry of Science and Technology, India

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Ministry of Education, Culture, Sports, Science and Technology

# data[].attributes.fundings[].funder_name
World Premier International Research Center Initiative

# data[].attributes.titles[].title
Physics and Chemistry of Magnetic Fluids

# data[].attributes.descriptions[].description
磁性流体は，文字通り磁石に吸い寄せられる液体である．無重力での燃料輸送のために１９６０年代にNASAのPapellらがバルクの強磁性酸化鉄を粉砕して作製した磁性懸濁液に始まり，同時期に東北大学の下飯坂が化学的に合成した微小な強磁性酸化鉄ナノ粒子をコロイド溶液として安定に分散させたことで，実用材料として広く認知されるようになった[2]．磁石に引き寄せられる液体という意味では，現在までに，ナノ粒子を含まない均一な組成の磁性イオン液体なども発見されているが，磁場応答性の大きさなどの点から実際に使われてきたのはナノ粒子と適切な溶媒の複合材料であるコロイド溶液である．その用途は，本特集号で様々な専門家が寄稿しているように多岐にわたっているが，特筆すべき点として液体磁石という他にはない性質から，流体を使う機器を新たに設計する際にはその利用が一度は検討されることにある．言い換えれば，特異性ゆえに非専門家の目にとまる材料ということである．そこで本稿では，そうした際の理解の一助となることを願い，磁性流体の基礎となる物理と化学について簡単に概説する．

# data[].attributes.creators[].department
磁性・スピントロニクス材料研究センター/グリーン磁性材料グループ

# data[].attributes.publisher.organization
 一般社団法人 日本フルードパワーシステム学会

# data[].attributes.rights[].description
本稿は、学会誌フルードパワーシステム（https://jfps.jp/03_04.html） 掲載論文の再掲である。

# data[].attributes.titles[].title
Figures of merit and screening approaches for evaluating heat generation in magnetic nanoparticles for hyperthermia

# data[].attributes.descriptions[].description
The heating performance of magnetic nanoparticles for hyperthermia is typically assessed by the specific absorption rate (SARnano), measured under laboratory-specific irradiation conditions. However, since SARnano depends heavily on magnetic field amplitude and frequency, comparing material performance across studies is challenging. This study introduces additional indicators, such as the heating selectivity ratio (which reflects side effects) and the specific power factor (device load), and demonstrates that the ratio of experimentally generated heat to theoretical maximum heat output is a more reliable metric for heat generation efficiency, independent of irradiation conditions. Conventional measurement conditions may not reveal nanoparticles with the highest heating potential, so a predictive method based on blocking temperature and switching field distribution was developed. This method accurately predicts heating behavior for immobilized nanoparticles but needs improvement to account for dipolar interactions and particle rotations. The proposed metrics and framework provide a more robust approach to evaluating nanoparticle performance for hyperthermia.

# data[].attributes.fundings[].funder_name
Government of Japan Ministry of Education Culture Sports Science and Technology

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.filesets[].filename
2026 Materials_Today_Nano_Figures of merit and screening approaches for evaluating heat generation in magnetic nanoparticles for hyperthermia.pdf

# data[].attributes.thumbnail.filename
2026 Materials_Today_Nano_Figures of merit and screening approaches for evaluating heat generation in magnetic nanoparticles for hyperthermia.pdf

# data[].attributes.titles[].title
Slip System Analysis of Magnesium Alloy AZ31B in Warm Compression by Visco-Plastic Self-Consistent Simulation

# data[].attributes.descriptions[].description
The active deformation mode (slip systems and twinning) of extruded AZ31B alloy (Mg-3Al-1Zn, mass %) during compression at RT, 100 ℃ and 150 ℃ was investigated by visco-plastic self-consistent (VPSC) simulation. Compression tests were first performed to obtain compression curve of AZ31B. The VPSC model was fitted to the compression curves to estimate the Voce hardening parameters which are required for the VPSC simulation. In the case of compression along the extrusion direction, work-hardening occurred rapidly with the transition of dominant deformation modes at all temperatures. In the case of compression to the other directions, basal <a> slip was dominant throughout the deformation at all compression temperatures. In addition, prismatic <a> slip and tensile twin were active in the early stage of deformation, and pyramidal <c+a> slip became active in the later stage of deformation. Pyramidal <c+a> slip became more active with increasing temperature from RT to 100 ℃, whereas basal <a> and prismatic <a> slips became more active with increasing temperature from 100 ℃ to 150 ℃. These different trends in the change of the active slip system with increasing temperature can be attributed to the CRSS maximum of the pyramidal <c+a> slip located around 100 ℃.

# data[].attributes.titles[].title
Breathing‐Induced Airflow Measurements at Multiple Positions in a 3D‐Printed Nasal Cavity

# data[].attributes.descriptions[].description
Evaluating nasal cavity airflow is crucial in both fundamental science and clinical settings. While rhinomanometry (RM) effectively assesses global nasal resistance, developing alternative methods for detailed local structural evaluation remains challenging. Here, we report an approach to measure local pressure at multiple positions in the nasal cavity using 3D-printed models created based on computed tomography data of five healthy individuals. This approach records multiple pressure differential values at arbitrary positions in the nasal cavity during a breathing-like inhalation/exhalation cycle. The measured data are unique to the corresponding individuals and correlate well with the RM results from human-assisted breathing using the 3D-printed models. Our experimental approach will open up possibilities for a deeper understanding of the relationship between fluid dynamics in the nasal cavity and practical air flow in the nasal cavity.

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.filesets[].filename
Advanced Sensor Research - 2026 - Shiba - Breathing‐Induced Airflow Measurements at Multiple Positions in a 3D‐Printed.pdf

# data[].attributes.thumbnail.filename
Advanced Sensor Research - 2026 - Shiba - Breathing‐Induced Airflow Measurements at Multiple Positions in a 3D‐Printed.pdf

# data[].attributes.descriptions[].description
Using a realistic model relevant to La2CuO4 and other altermagnetic perovskite oxides, we study interrelations between weak ferromagnetism (WF), anomalous Hall effect (AHE), and net orbital magnetization (OM). All of them can be linked to the form of Dzyaloshinskii-Moriya (DM) interactions. Nevertheless, while spin WF is induced by the DM vector components having the same sign in all equivalent bonds, AHE and OM are related to alternating-sign components, which do not contribute to any canting of spins. The microscopic model remains invariant under the symmetry operation combining the shift of antiferromagnetically coupled sublattices to each other with the spin flip. Thus, the band structure remains Kramers-degenerate, but the time-reversal symmetry is broken, providing a possibility to realize AHE in antiferromagnetic substances. The altermagnetic splitting of bands, breaking this symmetry, does not play a major role in the problem. More important is the orthorhombic strain, responsible for finite values of AHE and OM.

# data[].attributes.titles[].title
Optical Detection of Sliding Ferroelectric Switching in hBN with a WSe₂ Monolayer

# data[].attributes.descriptions[].description
When two BN layers are stacked in parallel in an AB or BA arrangement, a spontaneous out-of-plane electric polarization arises due to charge transfer in the out-of-plane B–N bonds. The ferroelectric switching from AB to BA (or BA to AB) can be achieved with a relatively small out-of-plane electric field through the in-plane sliding of one atomic layer over the other. However, the optical detection of such ferroelectric switching in hBN has not yet been demonstrated. In this study, we utilize an adjacent WSe2 monolayer to detect the ferroelectric switching in BN. This dynamic coupling between a two-dimensional (2D) ferroelectric and a 2D semiconductor allows for the fundamental investigation of the ferroelectric material using a nondestructive, local optical probe, offering promising applications for compact and nonvolatile memory devices.

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.creators[].organization
National Institute for Materials Science

# data[].attributes.rights[].description
This document is the Accepted Manuscript version of a Published Article that appeared in final form in Nano Letters, copyright © 2024 American Chemical Society. To access the final published article see https://doi.org/10.1021/acs.nanolett.4c05062.

# data[].attributes.fundings[].funder_name
Ministry of Education, Culture, Sports, Science and Technology

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Japan Society for the Promotion of Science

# data[].attributes.fundings[].funder_name
Institute for Quantum Technologies in Occitanie