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Magnetoresistance Effect of Black Phosphorus.

Research Project

Project/Area Number 62460020
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionIWATE University

Principal Investigator

SHIBATA Kiyotaka (1988)  Faculty of Engineering, Iwate University, 工学部, 助手 (40187399)

森田 章 (1987)  岩手大学, 工学部, 教授 (20004228)

Co-Investigator(Kenkyū-buntansha) MORITA Akira  , 東北大学名誉教授 (20004228)
BABA Mamoru  Faculty of Engineering, Iwate University, 工学部, 助教授 (20111239)
柴田 清孝  岩手大学, 工学部, 助手 (40187399)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1988: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1987: ¥4,400,000 (Direct Cost: ¥4,400,000)
Keywordssemiconductor physics / magmetoresistance effect / Anderson localization / impurity conduction / band structure / energy band calculation / pseudopotential method / 半導体の電子-格子振動相互作用 / 半導体の電子一格子振動相互作用
Research Abstract

1. An all-closed bismuth-flux method for preparing black P single crystals was improved from the point of view that chemical impurities will be reduced as much as possible and poisonous white P must be handled safely. In the method, the conversion of red P to white P and the growth of black P single crystals were performed in an evacuated quartz-glass apparatus without breaking the vacuum. Some crystal morphologies for needle-like crystals were observed and analyzed crystallographically.
2. We have found that the needle crystals of black P show the lobT dependence of the conductivity and the logH dependence of the negative magnetoresistance ( vs H) below -10K. The negative magnetoresistance has a remarkable angular dependence of large for H and small got H//. These results show that two-dimensional Anderson localization is caused particularly in the black-P needle ceystals and the localization is suppressed by temperarure, magnetic field and electric field.
It is also found that a Hall coefficient of black P is reversed from a hole-like plus sign to an electron-like minus sign. This suggests that a surface inversion-layer will be formed on the needle crystal.
3. The energy band calculation of black P based on an ab-initio norm-conserving pseudopotential was presented. It has been that the results are in better agreement with experimental results regarding the energy band, density of states, reflectance spectra, static dielectric constant, plasma frequency, except for effective masses. The energy band calculation under pressure was also performed. It has been found that the results are in good agreement with the experimental results of structural properties and pressure dependencies of energy gap and TAy phonon frequency.
Theoretical and experimental results of black P such as a narrow and direct-allowed-transition band-gap and a layered structure suggest that black P has a potential use to an infrared detector and new intercalation compounds.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Kiyotaka SHIBATA: Journal of the Physical Society of Japan.56. 1928-1931 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kiyotaka,SHIBATA: Journal of the Physical Society of Japan.57. 1876-1879 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 柴田,清孝: 岩手大学工学部研究報告. 41. 47-59 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Mamoru BABA: Japanese Journal of Applyed Physics.28. (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kiyotaka SHIBATA: Journal of the Physical Society of Japan.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Akira,MORITA: Journal of the Physical Society of Japan.58. 1694-1704 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kiyotaka,SHIBATA: "The Energy Band Structure of Black Phosphorus and Angle-Resolved Photoelectron Spectra." Journal of the Physical Society of Japan.56. 1928-1931 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kiyotaka,SHIBATA: "Revised Results for the Band Properties of Black Phosphorus." Journal of the Physical Society of Japan.57. 1876-1879 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kiyotaka,SHIBATA: "Electronic Structure of Black Phosphorus and Structural Properties under Pressure." Report on Technology of IWATE University.41. 47-59 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Mamoru,BABA: "Preparation of Black Phosphorus Single Crystals by a Completely Closed Bismuth-Flux Method and Their Crystal Morphology." Japanese Journal of Applied Physics.28. 1019-1022 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kiyotaka,SHIBATA: "Band Structure and Structural Properties of Black Phosphorus under Pressure." Journal of the Physical Society of Japan.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Akira,MORITA: "Electron-Phonon Interaction and Anisotropic Mobility in Black Phosphorus." Journal of the Physical Society of Japan.58. 1694-1704 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 柴田清孝: 岩手大学工学部研究報告. 41. 47-59 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Mamoru,BABA: Japanese Journal of Applied Physics.

    • Related Report
      1988 Annual Research Report
  • [Publications] Akira,MORITA: Journal of the Physical Society of Japan.

    • Related Report
      1988 Annual Research Report
  • [Publications] Kiyotaka Shibata: J.Phys.Soc.Japan. 56. 1928-1931 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] Kiyotaka Shibata: J.Phys.Soc.Japan.

    • Related Report
      1987 Annual Research Report
  • [Publications] Mamoru Baba: Japanese J.Appl.Phys.

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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