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[[Vol. 36]Modulating Superconductivity of Two Dimensional Atomic Layers of Indium with Charge Transfer from Self-assembled Organic Molecules_ WPI-MANA.pdf](https://mdr.nims.go.jp/filesets/5e1c8d69-950d-4798-821a-9e3c422d7543/download)

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International Center for Materials Nanoarchitectonics (WPI-MANA)

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[[Research Highlights Vol.36] Modulating Superconductivity of Two Dimensional Atomic Layers of Indium with Charge Transfer from Self-assembled Organic Molecules](https://mdr.nims.go.jp/datasets/721df40b-cb00-4468-923a-0409a426d0d8)

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2022/04/04 10:07 Modulating Superconductivity of Two Dimensional Atomic Layers of Indium with Charge Transfer from Self-assembled Organ…https://www.nims.go.jp/mana/research/highlights/vol36.html 1/3Previous  Index  NextResearch Highlights[Vol. 36]Modulating Superconductivity of Two Dimensional Atomic Layers of Indium withCharge Transfer from Self-assembled Organic Molecules28 Mar, 2018Charge and spin transfer from copper-phthalocyanine organic molecules self-assembledon superconducting atomic layers of indium modifies the superconducting transitiontemperature of the indium.Figure: Modulation of Tc of indium by self-assembled layers of organic molecules.There have been tremendous advances in the self-assembly of organic molecules on solid surfacesvia non-covalent bonds. Furthermore, research on self-assembly of two dimensional (2D) materialshas yielded deep insights into the properties of superconducting 2D materials with atomic-scalethickness that could potentially lead to the creation of new hybrid materials and electronic devicesthrough the so-called ‘bottom-up’ approach based on self-assembly as opposed to nanofabricationusing etching and lithography. Notably, the unique physical proprieties of organic molecules offeradvantages in terms of flexible and rational design and are an appealing approach with thepossibility of opening up new fields of research.With a view to controlling superconductivity in 2D atomic layers, Takashi Uchihashi and colleaguesat International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute forMaterials Science,Tsukuba, Japan and collaborators at the Institute for Molecular Science, Okazaki,Japan, and Graduate School of Advanced Integration Science, Chiba University, Chiba, Japan,report the first observation of self-assembled organic molecules modulating the superconductingtransport properties of an underlying 2D atomic-layer metallic material.https://www.nims.go.jp/mana/research/highlights/vol35.htmlhttps://www.nims.go.jp/mana/research/highlights/index.htmlhttps://www.nims.go.jp/mana/research/highlights/vol37.html2022/04/04 10:07 Modulating Superconductivity of Two Dimensional Atomic Layers of Indium with Charge Transfer from Self-assembled Organ…https://www.nims.go.jp/mana/research/highlights/vol36.html 2/3Specifically, the researchers fabricated 2D heterostructures consisting of an atomic layer of indium(In) epitaxially grown on a silicon substrate and a highly ordered metal-phthalocyanine (MPc, M =Mn, Cu) self-assembled onto the In layer. In this heterostructure, “charge transfer and local spinsdue to the presence of organic molecules modified the superconducting properties of the atomiclayer”.Examination of the 2D heterostructures led the researchers unexpectedly find that that substitutionof the atom of metal-phthalocyanine from Mn to Cu changed the superconducting transitiontemperature (Tc) from 3.05 K to 3.20 K, that is, from a negative to positive direction. Furtheranalysis combined with scanning tunneling microscopy (STM), X-ray magnetic circular dichroism(XMCD), and ab initio calculations revealed that this distinct phenomenon was due to competitionbetween charge and spin effects.“Particularly important is the directionality of the relevant d-orbitals that play a decisive role inmagnetic interactions,” says Uchihashi. “It strongly suggests the feasibility of controllingmacroscopic superconducting properties through manipulation of molecular states.”Reference“Controlled Modification of Superconductivity in Epitaxial Atomic Layer−Organic MoleculeHeterostructures”Shunsuke Yoshizawa[2], Emi Minamitani[3], Saranyan Vijayaraghavan[1], Puneet Mishra[1],Yasumasa Takagi[4], Toshihiko Yokoyama[4], Hiroaki Oba[5], Jun Nitta[5], Kazuyuki Sakamoto[5],Satoshi Watanabe[3], Tomonobu Nakayama[1], and Takashi Uchihashi[1]Journal : Nano Lett. 17, 2287−2293, (2017).DOI : 10.1021/acs.nanolett.6b05010Affiliations[1] International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute forMaterials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan[2] International Center for Young Scientists (ICYS), National Institute for Materials Science, 1-1,Namiki, Tsukuba, Ibaraki 305-0044, Japan[3] Department of Materials Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo113-8656, Japan[4] Institute for Molecular Science, Myoudaiji Campus, 38 Nishigo-Naka, Myodaiji, Okazaki, Aichi444-8585, Japan[5] Department of Nanomaterials Science, Graduate School of Advanced Integration Science, ChibaUniversity, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japanhttps://samurai.nims.go.jp/profiles/nakayama_tomonobu?locale=enhttps://samurai.nims.go.jp/profiles/uchihashi_takashi?locale=enhttps://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b050102022/04/04 10:07 Modulating Superconductivity of Two Dimensional Atomic Layers of Indium with Charge Transfer from Self-assembled Organ…https://www.nims.go.jp/mana/research/highlights/vol36.html 3/3Contact informationInternational Center for Materials Nanoarchitectonics(WPI-MANA)National Institute for Materials Science1-1 Namiki, Tsukuba, Ibaraki 305-0044 JapanPhone: +81-29-860-4710E-mail: mana-pr[AT]ml.nims.go.jp