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Control of carrier localization in dilute magnetic semiconductors

Research Project

Project/Area Number 17K05494
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionYokohama National University

Principal Investigator

Raebiger Hannes  横浜国立大学, 大学院工学研究院, 准教授 (20531403)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords磁性半導体 / ピエゾ効果 / ピエゾ磁性 / 第一原理計算 / carrier localization / polaron states / strain engineeting / magnetic semiconductors / strain engineering / 計算物理 / スピンエレクトロニクス / 半導体物性
Outline of Final Research Achievements

This is a theoretical study of carrier localization in magnetic semiconductors. When this project began, the control of magnetism in magnetic semiconductors by modulating carrier densities was established, but investigations on the role of carrier localization were scarce. During this study, we elucidated (1) control of carrier localization by axial strain in semiconductors, (2) control of magnetic interactions in magnetic semiconductors by charge carriers, and (3) modulation of magnetism in magnetic semiconductors by axial strain. We thus discovered a new piezo magnetic effect.

Academic Significance and Societal Importance of the Research Achievements

半導体・絶縁体に置ける伝道キャリアの局在性を計算するための理論手法の開発研究を行なった。伝導キャリアの局在性とともに磁性半導体の磁性を制御できる新たな物理現象を発見した。この研究は現代の薄膜デバイスに磁性の制御の機能を付与するための指針を与えるものである。
現代の電子デバイスの発展は小型化や薄膜化によって牽引されており、数原子層単位における磁性の制御は近未来に向けたメモリ素子やスピン制御デバイスの開発の要である。本研究は薄膜における磁性の制御メカニズムを提示することで、これからの日本社会の薄膜磁性デバイスの開発への現実的な構図を提示するものである。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (13 results)

All 2020 2019 2018 2017

All Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Book (1 results)

  • [Journal Article] Carrier mediated ferromagnetism in Ga2O3:Cr2020

    • Author(s)
      Ichihashi Kodai、Shinya Hikari、Raebiger Hannes
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 2 Pages: 021002-021002

    • DOI

      10.35848/1882-0786/ab6ca6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Modulation of the optical absorption edge of ε- and κ-Ga2O3 due to Co impurities caused by band structure changes: Work function measurements and first-principle calculations2020

    • Author(s)
      Yamanaka K.、Raebiger H.、Mukai K.、Shudo K.
    • Journal Title

      Journal of Applied Physics

      Volume: 127 Issue: 6 Pages: 065701-065701

    • DOI

      10.1063/1.5134521

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Core Electron Topologies in Chemical Compounds: Case Study of Carbon versus Silicon2018

    • Author(s)
      Yoshida Daisuke、Raebiger Hannes、Shudo Ken-ichi、Ohno Koichi
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 57 Issue: 24 Pages: 7012-7018

    • DOI

      10.1002/anie.201713108

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Control of hole localization in magnetic semiconductors by axial strain2018

    • Author(s)
      Raebiger Hannes、Bae Soungmin、Echeverria-Arrondo Carlos、Ayuela Andres
    • Journal Title

      Physical Review Materials

      Volume: 2 Issue: 2 Pages: 024402-024402

    • DOI

      10.1103/physrevmaterials.2.024402

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Strain control of carrier localization in piezoelectrics2019

    • Author(s)
      H. Raebiger, S. Bae
    • Organizer
      30th International Conference on Defects in Semiconductors, Seattle, WA, USA
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Calculation of ferromagnetic semiconductors: Cr-doped beta-Ga2O32019

    • Author(s)
      K. Ichihashi, H. Raebiger
    • Organizer
      30th International Conference on Defects in Semiconductors, Seattle, WA, USA
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electronic states and band gap adjustment of Co-impurity doped epsilon-Ga2O3 and kappa-Ga2O32019

    • Author(s)
      K. Yamanaka, K. Shudo, H. Raebiger
    • Organizer
      30th International Conference on Defects in Semiconductors, Seattle, WA, USA
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] First principles calculation of hole doped La2CuO42019

    • Author(s)
      Riku SHIROTA, H. Raebiger
    • Organizer
      29th Annual Meeting of MRS-J (2019), Yokohama, Japan
    • Related Report
      2019 Annual Research Report
  • [Presentation] Carrier localization and piezomagnetism in magnetic semiconductors2018

    • Author(s)
      Hannes Raebiger and Soungmin Bae
    • Organizer
      10th international conference and school on physics and applications of spin phenomena in solids
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Defect Theory from first principles calculations2017

    • Author(s)
      H. Raebiger
    • Organizer
      29th International Conference on Defects in Semiconductors, Matsue, Japan
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Hole localization trends and engineering them in magnetic semiconductors2017

    • Author(s)
      H. Raebiger
    • Organizer
      Workshop on Computational Semiconductors Physics (CSP2017), Hohhot, Inner Mongolia, P. R. China
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Engineering hole localization in magnetic semiconductors2017

    • Author(s)
      H. Raebiger
    • Organizer
      The 9th Con- ference of the Asian Consortium on Computational Materials Science (ACCMS-9), Kuala Lumpur, Malaysia
    • Related Report
      2017 Research-status Report
    • Invited
  • [Book] First principles methods for defects: state-of-the-art and emerging approaches in Characterisation and Control of Defects in Semiconductors2019

    • Author(s)
      Ertekin Elif、Raebiger Hannes
    • Publisher
      The IET, United Kingdom
    • ISBN
      9781785616556
    • Related Report
      2019 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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