• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

2次元物質ゲルマネンの実デバイス環境下における電子状態・輸送特性の理論研究

Research Project

Project/Area Number 16J10944
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionThe University of Tokyo

Principal Investigator

NI ZEYUAN  東京大学, 工学系研究科, 特別研究員(PD)

Project Period (FY) 2016-04-22 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2017: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2016: ¥600,000 (Direct Cost: ¥600,000)
Keywords2D material / surface / interface / topological insulator / DFT / materials informatics / 2D Xene / WTe2 / substrate
Outline of Annual Research Achievements

The drawbacks of graphene stimulate scientists to investigate novel 2D materials beyond graphene. Germanene and stanene have various fascinating properties, such as the Dirac-cone, ultrahigh carrier mobility, and the quantum spin Hall effect (QSHE). While they have been synthesized on several substrates in experiment, there is still a lack of suitable substrates to preserve the attractive Dirac-cone and QSHE. By combining DFT with materials informatics, we have found several suitable substrates for germanene and stanene from more than 185, 000 entries in the database. The interaction between the substrate and the target 2D materials is equivalent to pseudoelectric field, as revealed by our model analysis. (Physical Review B, 96, 075427) Furthermore, we are implementing a machine learning approach to provide accurate and fast simulation of the deposition procedure of 2D materials.

In addition to the original plan, we also put our eyes on WTe2, a member of transition metal dichalcogenides (TMDs) family. It has been a rising star in 2D materials due to the exotic non-saturating magnetoresistance (MR) and the possible type-II Weyl cone. However, the study about the surface relaxation and surface electronic structure is insufficient in WTe2, especially for few layer slabs. To solve the problems, we have investigated the accurate surface relaxation and mechanically tunable electronic structure in few-layer WTe2 (Applied Physics Express, 10, 045702; ACS Nano, 11, 11459). The research about the mechanically tunable surface dipole found in few-layer WTe2 is in preparation.

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (9 results)

All 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Acknowledgement Compliant: 1 results) Presentation (6 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Germanene and stanene on two-dimensional substrates: Dirac cone and Z2 invariant2017

    • Author(s)
      Z. Ni, E. Minamitani, Y. Ando, S. Watanabe
    • Journal Title

      Phys. Rev. B

      Volume: 96 Issue: 7 Pages: 075427-075427

    • DOI

      10.1103/physrevb.96.075427

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Surface structure of novel semimetal WTe22017

    • Author(s)
      K. Kawahara, Z. Ni, R. Arafune, T. Shirasawa, C.-L. Lin, E. Minamitani, S. Watanabe, M. Kawai, N. Takagi
    • Journal Title

      Applied Physics Express

      Volume: 10 Issue: 4 Pages: 0457021-4

    • DOI

      10.7567/apex.10.045702

    • NAID

      210000135826

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Visualizing Type-II Weyl Points in Tungsten Ditelluride by Quasiparticle Interference2017

    • Author(s)
      C.-L. Lin, R. Arafune, R.-Y. Liu, M. Yoshimura, B. Feng, K. Kawahara, Z. Ni, E. Minamitani, S. Watanabe, Y. Shi, M. Kawai, T.-C. Chiang, I. Matsuda, N. Takagi
    • Journal Title

      Acs nano

      Volume: 11 Issue: 11 Pages: 11459-11465

    • DOI

      10.1021/acsnano.7b06179

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Germanene and stanene on 2D substrates: Dirac-cone and Z2 invariant2017

    • Author(s)
      Zeyuan Ni, Emi Minamitani, Ando Yasunobu, Satoshi Watanabe
    • Organizer
      The 8th International Symposium on Surface Science (ISSS-8)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Germanene and stanene on 2D substrates: Dirac-cone and Z2 invariant2017

    • Author(s)
      Zeyuan Ni, Emi Minamitani, Ando Yasunobu, Satoshi Watanabe
    • Organizer
      IIRC-5
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Germanene and stanene on 2D substrates: Dirac-cone and Z2 invariant2016

    • Author(s)
      Zeyuan Ni, Emi Minamitani, Ando Yasunobu, Satoshi Watanabe
    • Organizer
      Joint Symposium of the Surface Science Society of Japan and the Vacuum Society of Japan, SSVS2016
    • Place of Presentation
      Nagoya, Japan
    • Year and Date
      2016-11-29
    • Related Report
      2016 Annual Research Report
  • [Presentation] Germanene and stanene on 2D substrates: Dirac-cone and Z2 invariant2016

    • Author(s)
      Zeyuan Ni, Emi Minamitani, Ando Yasunobu, Satoshi Watanabe
    • Organizer
      CNT25
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2016-11-15
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Germanene and stanene on 2D substrates: Dirac-cone and Z2 invariant2016

    • Author(s)
      Zeyuan Ni, Emi Minamitani, Ando Yasunobu, Satoshi Watanabe
    • Organizer
      The 19th Asian Workshop on First-Principles: Electronic Structure Calculations (ASIAN-19)
    • Place of Presentation
      Hsingchu, Taiwan
    • Year and Date
      2016-10-31
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Theoretical Search for Suitable Substrates of Germanene and Stanene: Towards the Dirac-cone and Practical Application2016

    • Author(s)
      Zeyuan Ni, Emi Minamitani, Ando Yasunobu, Satoshi Watanabe
    • Organizer
      Gordon Research Conference: Two Dimensional Electronics Beyond Graphene
    • Place of Presentation
      South Hadley, USA
    • Year and Date
      2016-06-05
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2016-05-17   Modified: 2024-03-26  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi