2000年9月
Effect of quantum fluctuation on the Andreev reflection
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 69
- 号
- 9
- 開始ページ
- 2739
- 終了ページ
- 2742
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.69.2739
- 出版者・発行元
- PHYSICAL SOC JAPAN
We investigate the dynamical quantum fluctuation effect on an Andreev current through an ultrasmall superconductor in the Coulomb blockade regime. We calculate the current using a phenomenological gauge invariant model and the real-time path-integral method. We choose a special gauge which absorbs the scalar potential to convert the phase of a superconductor as a dynamical variable. A zero-energy phase fluctuation of the superconductor suppresses the Andreev current at low bias voltage. This suppression is expected to be observed in samples with large level spacing and small charging energy which allow the coexistence of a large quantum fluctuation and Andreev reflection process.
- リンク情報
- ID情報
-
- DOI : 10.1143/JPSJ.69.2739
- ISSN : 0031-9015
- Web of Science ID : WOS:000089598400007