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2016 Fiscal Year Final Research Report

Realization of quantum spin Hall effect in electron-hole composite quantum wells

Research Project

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Project/Area Number 26287068
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionNTT Basic Research Laboratories

Principal Investigator

Suzuki Kyoichi  日本電信電話株式会社NTT物性科学基礎研究所, 量子電子物性研究部, 主任研究員 (20393770)

Co-Investigator(Kenkyū-buntansha) 入江 宏  日本電信電話株式会社NTT物性科学基礎研究所, 量子電子物性研究部, 研究主任 (20646856)
小野満 恒二  日本電信電話株式会社NTT物性科学基礎研究所, 機能物質科学研究部, 主任研究員 (30350466)
村木 康二  日本電信電話株式会社NTT物性科学基礎研究所, 量子電子物性研究部, 上席特別研究員 (90393769)
Research Collaborator Francois Couedo  日本電信電話株式会社, NTT物性科学基礎研究所・量子電子物性研究部, リサーチアソシエイト
AKIHO Takafumi  日本電信電話株式会社, NTT物性科学基礎研究所・量子電子物性研究部, 研究員 (50786978)
Project Period (FY) 2014-04-01 – 2017-03-31
Keywordsトポロジカル絶縁体 / 半導体ヘテロ構造 / 量子スピンホール効果 / 量子化伝導
Outline of Final Research Achievements

We have realized topological insulator (TI)-semimetal transition in InAs/GaSb semiconductor heterostructures by applying back and front gate voltages. In addition, we have succeeded in detecting the conductance very close to the quantized value using the sample with a specialized shape and an electrode arrangement. In InAs/InGaSb heterostructures instead of GaSb, we have observed the energy gap larger than the room temperature.

Free Research Field

半導体物理学

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Published: 2018-03-22  

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