Phase information from two-terminal conductance of quantum dot systems

Tomohiro Otsuka, Hisashi Aikawa, Mikio Eto, Gyong L. Khym, Kicheon Kang, Yasuhiro Iye, Shingo Katsumoto

研究成果: Conference contribution

抄録

Two-terminal devices generally work as "leaky resonators" in coherent transport, which mixes up the quantum phase information from all parts of the devices, e.g., quantum dots (QDs) embedded in them. With the aid of appropriate theoretical modeling, however, we can extract important information on the phase from the total conductance. As typical examples, we present here experiments in a side-coupled QD, and a QD embedded in an Aharonov-Bohm (AB) ring. In the former, kinetic degrees of freedoms transverse and longitudinal to a quantum wire give rise to dramatic change in the interference effect. In the latter, "phase shift locking to π/2" appears as a plateau structure in the conductance. Specialized theoretical models give reasonable explanations to these effects, bringing important information on the phase of the electron wavefunctions in the QDs.

本文言語English
ホスト出版物のタイトルPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
ページ855-856
ページ数2
DOI
出版ステータスPublished - 2007
イベント28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
継続期間: 2006 7月 242006 7月 28

出版物シリーズ

名前AIP Conference Proceedings
893
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
国/地域Austria
CityVienna
Period06/7/2406/7/28

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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