Index Catalog // MDR

Growth dynamics of selective-area-grown rutile-type SnO2 on TiO2 (110) substrate

Description/Abstract:: We demonstrated selective-area growth of r-SnO2 on a SiO2-masked r-TiO2 (110) substrate. The heteroepitaxy on a window started with a Vol...
Keyword:: SnO2 and selective area growth
Resource Type:: Article
Author:: Hitoshi Takane, Takayoshi Oshima, Katsuhisa Tanaka, and Kentaro Kaneko
Journal:: Applied Physics Express
Date Uploaded:: 13/04/2024

Critical current improvement and resistance evaluation of superconducting joint between Bi2223 tapes

Description/Abstract:: We improved the critical current (Ic) of the superconducting joint between the Bi2223 tapes by introducing the two-step sintering process...
Keyword:: Superconducting joint
Resource Type:: Article
Author:: Y Takeda, K Kobayashi, A Uchida, H Kitaguchi, G Nishijima, Y Yanagisawa, T Nakashima, S Yamade, S Kobayashi, T Kato, S Nakamura, T Motoki, and J Shimoyama
Journal:: Superconductor Science and Technology
Date Uploaded:: 05/04/2024

Review of the temporal stability of the magnetic field for ultra-high field superconducting magnets with a particular focus on superconducting joints between HTS conductors

Description/Abstract:: Superconducting magnets used in applications such as magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) require signif...
Keyword:: Superconducting joint
Resource Type:: Article
Author:: Y Takeda, H Maeda, K Ohki, and Y Yanagisawa
Journal:: Superconductor Science and Technology
Date Uploaded:: 05/04/2024

The effect of intermediate layer densification on the critical current of a Bi-2223 superconducting joint

Description/Abstract:: The effect of intermediate layer densification on the critical current (Ic) of Bi-2223 superconducting joints was quantitatively studied....
Keyword:: Superconducting joint
Resource Type:: Article
Author:: Y Takeda, G Nishijima, K Inoue, Y Takano, and H Kitaguchi
Journal:: Superconductor Science and Technology
Date Uploaded:: 05/04/2024

Interpretation of time-dependent current and resistance of HTS closed loop with superconducting joint considering flux creep

Description/Abstract:: A low circuit resistance is required for a superconducting magnet operated in persistent mode using superconducting joints. We performed ...
Keyword:: Superconducting joint
Resource Type:: Article
Author:: Yasuaki Takeda, Yuji Tsuchiya, and Gen Nishijima
Journal:: Applied Physics Express
Date Uploaded:: 05/04/2024

Angular dependence of resistance and critical current of a Bi-2223 superconducting joint

Description/Abstract:: Low resistance and high critical current are prerequisites for superconducting joints used in persistent-mode magnets. Herein, we use a j...
Keyword:: Superconducting joint
Resource Type:: Article
Author:: Y Takeda, G Nishijima, U Nakai, T Motoki, J Shimoyama, and H Kitaguchi
Journal:: Superconductor Science and Technology
Date Uploaded:: 05/04/2024

Quantitative characterization of built-in potential profile across GaAs p–n junctions using Kelvin probe force microscopy with qPlus sensor AFM

Description/Abstract:: The electrostatic potential distribution in materials and devices plays an important role in controlling the behaviors of charge carriers...
Keyword:: GaAs(110), Kelvin probe force microscopy, p-n junction, and qPlus sensor
Resource Type:: Article
Author:: Nobuyuki Ishida and Takaaki Mano
Journal:: Nanotechnology
Date Uploaded:: 03/04/2024

Linear response theories for interatomic exchange interactions

Description/Abstract:: The purpose of this review is to elaborate basic ideas of the linear response theories for the exchange interactions as well as more rese...
Keyword:: linear response theory, Dzyaloshinskii–Moriya interactions, electronic structure, exchange interactions, ligand states, and transition-metal oxides and related compounds
Resource Type:: Article
Author:: I V Solovyev
Journal:: Journal of Physics: Condensed Matter
Date Uploaded:: 19/03/2024

2023 Roadmap on molecular modelling of electrochemical energy materials

Description/Abstract:: Overall, this roadmap originating from 20 groups in 11 countries serves as a gateway for both the experts and the beginners to have a qui...
Keyword:: density-functional theory, electrocatalysis, electrochemical energy storage, electrochemical interfaces, machine learning, and molecular dynamics simulation
Resource Type:: Article
Author:: Chao Zhang, Jun Cheng, Yiming Chen, Maria K Y Chan, Qiong Cai, Rodrigo P Carvalho, Cleber F N Marchiori, Daniel Brandell, C Moyses Araujo, Ming Chen, Xiangyu Ji, Guang Feng, Kateryna Goloviznina, Alessandra Serva, Mathieu Salanne, Toshihiko Mandai, Tomooki Hosaka, Mirna Alhanash, Patrik Johansson, Yun-Ze Qiu, Hai Xiao, Michael Eikerling, Ryosuke Jinnouchi, Marko M Melander, Georg Kastlunger, Assil Bouzid, Alfredo Pasquarello, Seung-Jae Shin, Minho M Kim, Hyungjun Kim, Kathleen Schwarz, and Ravishankar Sundararaman
Journal:: Journal of Physics-Energy
Date Uploaded:: 05/03/2024

Initial stage of InSb heteroepitaxial growth on GaAs (111)A: effect of thin InAs interlayers

Description/Abstract:: Molecular-beam epitaxy of InSb on the (111)A-oriented GaAs substrates has been studied using electron diffraction, x-ray diffraction, and...
Keyword:: GaAs, InAs, InSb, Metamorphic, and Molecular beam epitaxy
Resource Type:: Article
Author:: Akihiro Ohtake and Takaaki Mano
Journal:: Japanese Journal of Applied Physics and JAPANESE JOURNAL OF APPLIED PHYSICS
Date Uploaded:: 13/02/2024

Rutile-type GexSn1−xO2 alloy layers lattice-matched to TiO2 substrates for device applications

Description/Abstract:: We report the characterization and application of mist-CVD-grown rutile-structured GexSn1−xO2 (x = ∼0.53) films lattice-matched to isostr...
Keyword:: GeO2, SnO2, and TiO2
Resource Type:: Article
Author:: Hitoshi Takane, Takayoshi Oshima, Takayuki Harada, Kentaro Kaneko, and Katsuhisa Tanaka
Journal:: Applied Physics Express
Date Uploaded:: 30/01/2024
Date Modified:: 01/02/2024

In vitro analysis of insoluble salt formation mechanism associated with Mg corrosion—variations depending on the diffusion environment in model tissue

Description/Abstract:: Magnesium (Mg) alloys have attracted attention as biodegradable metals, but the details of their corrosion behavior under biological env...
Keyword:: Raman spectroscopy, corrosion, in vitro model tissue, insoluble salt precipitation, and magnesium
Resource Type:: Article
Author:: Masanobu Hayashi, Akiko Yamamoto, Takayuki Aizawa, Yu Yusa, Yoshinaka Shimizu, and Yoshimichi Imai
Journal:: Biomedical Materials
Date Uploaded:: 24/01/2024

Halide Vapor Phase Epitaxy of twin-free a-Ga2O3 on sapphire (0001) substrates

Description/Abstract:: The halide vapor phase epitaxy of a-Ga2O3 is demonstrated for the first time. The films are twin-free, heteroepitaxially grown on sapphir...
Keyword:: HVPE and α-Ga2O3
Resource Type:: Article
Author:: Yuichi Oshima, Encarnación G. Víllora, and Kiyoshi Shimamura
Journal:: APPLIED PHYSICS EXPRESS
Date Uploaded:: 22/01/2024
Date Modified:: 22/01/2024

Rapid growth of α-Ga2O3 by HCl-boosted halide vapor phase epitaxy and effect of precursor supply conditions on crystal properties

Description/Abstract:: We investigated the effect of supply conditions of GaCl, O2, and additional HCl on the growth rate of (0001) alpha-Ga2O3 by halide vapor ...
Keyword:: HVPE and α-Ga2O3
Resource Type:: Article
Author:: Yuichi Oshima, Katsuaki Kawara, Takayoshi Oshima, Mitsuru Okigawa, and Takashi Shinohe
Journal:: SEMICONDUCTOR SCIENCE AND TECHNOLOGY
Date Uploaded:: 22/01/2024
Date Modified:: 23/01/2024

Growth and etching characteristics of (001) β- Ga2O3 by plasma-assisted molecular beam epitaxy

Description/Abstract:: We investigated the growth characteristics of homoepitaxial (001) b-Ga2O3 by plasma-assisted molecular beam epitaxy.
Keyword:: MBE and β-Ga2O3
Resource Type:: Article
Author:: Yuichi Oshima, Elaheh Ahmadi, Stephen Kaun, Feng Wu, and James S Speck
Journal:: SEMICONDUCTOR SCIENCE AND TECHNOLOGY
Date Uploaded:: 22/01/2024
Date Modified:: 23/01/2024

In-plane orientation control of (001) κ-Ga2O3 by epitaxial lateral overgrowth through a geometrical natural selection mechanism

Description/Abstract:: The present work demonstrates a new technique to solve the in-plane rotational domain problem. In the technique, κ-Ga2O3 was grown by epi...
Keyword:: ELO, HVPE, domain, ε-Ga2O3, and κ-Ga2O3
Resource Type:: Article
Author:: Yuichi Oshima, Katsuaki Kawara, Takayoshi Oshima, and Takashi Shinohe
Journal:: JAPANESE JOURNAL OF APPLIED PHYSICS
Date Uploaded:: 22/01/2024
Date Modified:: 23/01/2024

Phase-controlled epitaxial lateral overgrowth of α-Ga2O3 by halide vapor phase epitaxy

Description/Abstract:: We investigated the effect of mask materials on the epitaxial lateral overgrowth (ELO) characteristics of alpha-Ga2O3 and developed an EL...
Keyword:: ELO, HVPE, and α-Ga2O3
Resource Type:: Article
Author:: Yuichi Oshima, Katsuaki Kawara, Takayoshi Oshima, Mitsuru Okigawa, and Takashi Shinohe
Journal:: JAPANESE JOURNAL OF APPLIED PHYSICS
Date Uploaded:: 22/01/2024
Date Modified:: 23/01/2024

Elimination of threading dislocations in α-Ga2O3 by double layered epitaxial lateral overgrowth

Description/Abstract:: We demonstrated the double layered epitaxial lateral overgrowth (ELO) of α-Ga2O3 by halide vapor phase epitaxy. Patterned masks were prep...
Keyword:: ELO, dislocation, and α-Ga2O3
Resource Type:: Article
Author:: Katsuaki Kawara, Yuichi Oshima, Mitsuru Okigawa, and Takashi Shinohe
Journal:: Applied Physics Express
Date Uploaded:: 22/01/2024
Date Modified:: 23/01/2024

Self-aligned patterning on β-Ga2O3 substrates via backside-exposure photolithography

Description/Abstract:: β-Ga2O3 has not been patterned using backside-exposure lithography, despite its high potential applications in future power electronics a...
Keyword:: Ga2O3 and lithography
Resource Type:: Article
Author:: Takayoshi Oshima
Journal:: JAPANESE JOURNAL OF APPLIED PHYSICS
Date Uploaded:: 17/01/2024
Date Modified:: 24/01/2024

Composition determination of beta-(AlxGa1-x)2O3 layers coherently grown on (010) beta-Ga2O3 substrates by high-resolution x-ray diffraction

Description/Abstract:: We demonstrate x-ray diffraction based composition estimation of b-(AlxGa1-x)2O3 coherently grown on (010) b-Ga2O3. The relation between ...
Keyword:: atom probe, composition, and β-Ga2O3
Resource Type:: Article
Author:: Yuichi Oshima, Elaheh Ahmadi, Stefan C. Badescu, Feng Wu, and James S. Speck
Journal:: APPLIED PHYSICS EXPRESS
Date Uploaded:: 11/01/2024
Date Modified:: 24/01/2024

Phase transitions and slow spin dynamics of slightly inverted A-site spinel CoAl2−xGaxO4

Description/Abstract:: We report the properties of an A-site spinel magnet, CoAl2−xGaxO4, and analyze its anomalous, low-temperature magnetic behavior, which is...
Keyword:: magnetic frustration, magnetic phase diagram, quantum critical point, and thermoremanent magnetization
Resource Type:: Article
Author:: T Naka, J Valenta, T Nakane, S Ishii, M Nakayama, H Mamiya, K Takehana, N Tsujii, Y Imanaka, Y Matsushita, H Abe, T Uchikoshi, and H Yusa
Journal:: JOURNAL OF PHYSICS-CONDENSED MATTER
Date Uploaded:: 25/12/2023

Topology optimization for piezoresistive nanomechanical surface stress sensors in anisotropic <111> orientations.

Description/Abstract:: MEMS-based piezoresistive nanomechanical sensors are compact sensing platforms widely employed in vapor sensing, environmental monitoring...
Keyword:: anisotropic materials, nanomechanical sensors, piezoresistive microcantilever, surface stress, and topology optimization
Resource Type:: Article
Author:: Kosuke Minami
Journal:: Nano Express
Date Uploaded:: 04/12/2023

Selective area growth of β-Ga2O3 by HCl-based halide vapor phase epitaxy

Description/Abstract:: We demonstrated selective area growth of β-Ga2O3 by HCl-based halide vapor phase epitaxy on SiO2-masked (001) and (010) β-Ga2O3 substrate...
Keyword:: Ga2O3 and selective area growth
Resource Type:: Article
Author:: Takayoshi Oshima and Yuichi Oshima
Journal:: Applied Physics Express
Date Uploaded:: 28/11/2023
Date Modified:: 28/11/2023

α-Al2O3/Ga2O3 superlattices coherently grown on r-plane sapphire

Description/Abstract:: Ten-period binary α-Al2O3/Ga2O3 superlattices were fabricated on r-plane sapphire substrates by molecular beam epitaxy. By systematic var...
Keyword:: Ga2O3 and Superlattice
Resource Type:: Article
Author:: Takayoshi Oshima, Yuji Kato, Masataka Imura, Yoshiko Nakayama, and Masaki Takeguchi
Journal:: APPLIED PHYSICS EXPRESS
Date Uploaded:: 28/11/2023
Date Modified:: 28/11/2023

Fabrication of coherent γ-Al2O3/Ga2O3 superlattices on MgAl2O4 substrates

Description/Abstract:: We succeeded in fabricating 10-period coherent γ Al2O3/Ga2O3 superlattices (SLs) on MgAl2O4 substrates by molecular beam epitaxy. By vary...
Keyword:: Ga2O3 and Superlattice
Resource Type:: Article
Author:: Yuji Kato, Masataka Imura, Yoshiko Nakayama, Masaki Takeguchi, and Takayoshi Oshima
Journal:: APPLIED PHYSICS EXPRESS
Date Uploaded:: 28/11/2023
Date Modified:: 28/11/2023

Hydrogen detection using membrane-type surface stress sensor

Description/Abstract:: This study shows a possibility of the application of a membrane-type surface stress sensor (MSS) with a Pd film to a hydrogen sensor. It ...
Keyword:: Hydrogen sensor and membrane-type surface stress sensor
Resource Type:: Article
Author:: Taro Yakabe, Gaku Imamura, Genki Yoshikawa, Masahiro Kitajima, and Akiko N Itakura
Journal:: Journal of Physics Communications
Date Uploaded:: 26/10/2023

Elastocaloric effect of shape memory polymers in elastic response regime

Description/Abstract:: The solid-state cooling/heating technology based on the elastocaloric effect is one of the promising alternatives to vapor compression sy...
Keyword:: Elastocaloric effect and Shape memory polymer
Resource Type:: Article
Author:: Takamasa Hirai, Koichiro Uto, Mitsuhiro Ebara, and Ken-ichi Uchida
Journal:: Journal of Physics-Energy
Date Uploaded:: 17/10/2023

Implementation strategies in phonopy and phono3py

Description/Abstract:: Scientific simulation codes are public property sustained by the community. Modern technology allows anyone to join scientific software p...
Keyword:: Phonon calculation
Resource Type:: Article
Author:: Atsushi Togo, Laurent Chaput, Terumasa Tadano, and Isao Tanaka
Journal:: JOURNAL OF PHYSICS-CONDENSED MATTER
Date Uploaded:: 08/08/2023

Understanding magnetocrystalline anisotropy based on orbital and quadrupole moments

Description/Abstract:: Understanding magnetocrystalline anisotropy (MCA) is fundamentally important for developing novel magnetic materials. Therefore, clarifyi...
Keyword:: magnetocrystalline anisotropy, orbital moment, quadrupole moment, first-principles calculation, spintronics, interface
Resource Type:: Article
Author:: Yoshio Miura and Jun Okabayashi
Journal:: Journal of Physics: Condensed Matter
Date Uploaded:: 10/05/2023

Mechanism of ion track formation in silicon by much lower energy deposition than the formation threshold

Description/Abstract:: The mechanism of the track formation in crystalline silicon (c-Si) under C60 ion irradiation with the medium energies of 1-9 MeV is discu...
Keyword:: C60 ion, ion track, silicon, swift heavy ion, synergy effect, and track recrystallization
Resource Type:: Article
Author:: H Amekura, K Narumi, A Chiba, Y Hirano, K Yamada, S Yamamoto, N Ishikawa, N Okubo, M Toulemonde, and Y Saitoh
Journal:: PHYSICA SCRIPTA
Date Uploaded:: 10/05/2023

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