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Unconventional Superconductivity in semiconductor systems

Research Project

Project/Area Number 25800197
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Kriener Markus  国立研究開発法人理化学研究所, 創発物性科学研究センター, 研究員 (60447919)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
KeywordsTopological Insulators / Topological SC / Unconventional SC / Semiconductors / Polar distortion / polar semiconductors
Outline of Final Research Achievements

This research project focussed on chemically simple semiconducting and insulating systems, which were thought to be candidate materials for topological insulators or possess a complicated band structure, strong spin-orbit coupling, a noncentrosymmetric structure a.s.o. where possibly unconventional superconductivity might be introduced by doping. The superconductivity in the doped topological insulators Bi2Se3 and SnTe was probed as well as various more systems. Beside superconductivity, also different interesting effects were found: In doped WSe2 a comparably large thermodynamic Figure of Merit of ~0.35 at 800 K was found along with an unexpected change in the band structure from three- to two-dimensional. In the polar system (Ge,Mn)Te, an additional ferromagnetic phase was identified which had been overlooked in the past. Moreover, it was successfully demonstrated, that (Ge,Mn)Te bears magnetic phase change memory functionality.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (14 results)

All 2016 2015 2014 2013 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Acknowledgement Compliant: 3 results) Presentation (8 results) (of which Invited: 5 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Modification of electronic structure and thermoelectric properties of hole-doped tungsten dichalcogenides2015

    • Author(s)
      M. Kriener, A. Kikkawa, T. Suzuki, R. Akashi, R. Arita, Y. Tokura, and Y. Taguchi
    • Journal Title

      Phys. Rev. B

      Volume: 91 Issue: 7

    • DOI

      10.1103/physrevb.91.075205

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Doping-dependent charge dynamics in CuxBi2Se32014

    • Author(s)
      Luke J. Sandilands, Anjan A. Reijnders, Markus Kriener, Kouji Segawa, Satoshi Sasaki, Yoichi Ando, and Kenneth S. Burch
    • Journal Title

      Phys. Rev. B

      Volume: 90 Issue: 9

    • DOI

      10.1103/physrevb.90.094503

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi_2Se_3, Bi_2Te_3, and Cu-Doped Bi_2Se_32013

    • Author(s)
      T. Kondo, Y. Nakashima, Y. Ota,Y. Ishida, W. Malaeb, K.Okazaki,S.Shin
    • Journal Title

      Physical Review Letters

      Volume: 110 Issue: 21 Pages: 217601-217601

    • DOI

      10.1103/physrevlett.110.217601

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Experimental studies of the topological superconductor CuxBi2Se32013

    • Author(s)
      Y. Ando, K. Segawa, S. Sasaki, and M. Kriener
    • Journal Title

      J. Phys.: Conf. Ser.

      Volume: 449 Pages: 012033-012033

    • DOI

      10.1088/1742-6596/449/1/012033

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unusual nature of fully gapped superconductivity in In-doped SnTe2013

    • Author(s)
      M. Novak, S. Sasaki, M. Kriener, K. Segawa, Y. Ando
    • Journal Title

      Physical Review B

      Volume: 88 Issue: 14

    • DOI

      10.1103/physrevb.88.140502

    • Related Report
      2013 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Magnetic Phase Diagram of the Doped Polar Semiconductor GeTe2016

    • Author(s)
      Markus Kriener
    • Organizer
      Indo-Japan Conference on Emergent Phenomena in Transition-Metal Compounds and Related Materials
    • Place of Presentation
      Indian Institute of Science, Bengaluru (Bangalore), India
    • Year and Date
      2016-03-28
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Magnetic Phase Diagram of the Polar Semiconductor Ge1-xMnxTe2015

    • Author(s)
      Markus Kriener
    • Organizer
      70th Autumn Meeting of the Physical Society of Japan
    • Place of Presentation
      Suita, Japan
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] Competing Magnetic Phases in the Doped Magnetic Semiconductor GeTe2015

    • Author(s)
      Markus Kriener
    • Organizer
      Invited Seminar of the research initiative "Quantum Matter and Materials", Institute of Physics II, University of Cologne
    • Place of Presentation
      University of Cologne, Germany
    • Year and Date
      2015-07-15
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Magnetic Phase Diagram of Mn-Doped GeTe Crystals (Poster)2015

    • Author(s)
      Markus Kriener
    • Organizer
      20th International Conference on Magnetism 2015
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2015-07-05
    • Related Report
      2015 Annual Research Report
  • [Presentation] Different Magnetic Phases in the Doped Polar Semiconductor GeTe2015

    • Author(s)
      Markus Kriener
    • Organizer
      Invited Seminar at the Institute of Condensed Matter Physics, EPF Lausanne
    • Place of Presentation
      EPF Lausanne, Switzerland
    • Year and Date
      2015-07-03
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Competition of the Magnetic Phases in the Doped Polar Semiconductor GeTe2015

    • Author(s)
      Markus Kriener
    • Organizer
      Invited Seminar at the Institute for Theoretical Physics, ETH Zuerich
    • Place of Presentation
      ETH Zurich, Switzerland
    • Year and Date
      2015-07-02
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Doping Effect on the Thermoelectric Properties of WSe1.6Te0.42014

    • Author(s)
      M. Kriener
    • Organizer
      69th Autumn Meeting of the Physical Society of Japan
    • Place of Presentation
      Kasugai, Japan
    • Year and Date
      2014-09-07
    • Related Report
      2014 Research-status Report
  • [Presentation] Possible Topological Superconductivity in CuxBi2Se3 and Sn1-xInxTe

    • Author(s)
      M. Kriener
    • Organizer
      3rd Super-PIRE REIMEI Workshop on Frontiers of Condensed Matter Physics
    • Place of Presentation
      Beijing, China
    • Related Report
      2013 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] メモリデバイス及び情報処理装置2015

    • Inventor(s)
      田口康二郎、クリーナー マルクス、金子良夫、十倉好紀
    • Industrial Property Rights Holder
      国立研究開発法人理化学研究所
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2015-198592
    • Filing Date
      2015-10-06
    • Related Report
      2015 Annual Research Report

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Published: 2014-07-25   Modified: 2020-05-15  

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