Andreev-reflection-induced conductance diffraction in mesoscopic normal-metal/Superconductor interfaces
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- Title
- Andreev-reflection-induced conductance diffraction in mesoscopic normal-metal/Superconductor interfaces
- Authors
- Lee, HJ; Shin, YS; So, HN; Kim, JJ; Kim, N; Yoo, KH
- Date Issued
- 2001-09
- Publisher
- KOREAN PHYSICAL SOC
- Abstract
- We observed conductance oscillations, which arose from the interference of quasiparticles Andreev-reflected from a mesoscopic single normal-metal/superconductor (N/S) interface with a phase gradient along its width. A 10 x 10 mum(2) Al island was overlaid on a pre-evaporated 0.5-mum-wide silver wire. The phase gradient along the N/S interface was induced by applying it magnetic field perpendicular to the plane of the superconducting Al island. The conductance across the N/S interface showed Fraunhofer-like oscillations with amplitudes of a small fraction or 2e(2)/h. For sufficiently low fields and temperatures, this interfacial diffraction effect of quasiparticles; is more complicated due to the field-induced electron-hole dephasing effect. The overall magnetic-field and temperature dependencies of the conductance oscillations are qualitatively consistent with the predicted diffraction of Andreev-reflected quasiparticles.
- Keywords
- PHASE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19394
- ISSN
- 0374-4884
- Article Type
- Article
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 39, no. 3, page. 534 - 539, 2001-09
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