Spin-polarized transport in Rashba quantum point contacts

T. Kita, T. Kakegawa, M. Akabori, S. Yamada*

*この研究の対応する著者

研究成果: Conference article査読

3 被引用数 (Scopus)

抄録

Two types of quantum point contacts (QPCs), side-gate quantum wire and split-gate QPCs, were fabricated at high In-content InGaAs/InAlAs single heterojunction which confines two-dimensional electron gas revealing strong Rashba spin-orbit interaction. In the side-gate quantum wire QPC, the conductance quantization in unit of 0.5(2e2/h) was mostly observed in the various samples with different dimensions. This is in contrast to the result in the split-gate QPC, where we confirmed usual (2e2/h) conductance quantization. Since those results were observed under zero magnetic field, the 0.5(2e2/h) quantization could be attributed not to the spin splitting but to the possible spin polarized transport due to the mode coupling between the one-dimensional subbands expected in sufficiently narrow adiabatic constrictions.

本文言語English
ページ(範囲)464-467
ページ数4
ジャーナルPhysica E: Low-Dimensional Systems and Nanostructures
22
1-3
DOI
出版ステータスPublished - 2004 4 1
外部発表はい
イベント15th International Conference on ELectronic Propreties - Nara, Japan
継続期間: 2003 7 142003 7 18

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学

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