Kundu, Arijit ; Rao, Sumathi ; Saha, Arijit (2009) Resonant spin transport through a superconducting double-barrier structure EPL: Europhysics Letters, 88 (5). Article ID 57003. ISSN 0295-5075
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Official URL: http://iopscience.iop.org/article/10.1209/0295-507...
Related URL: http://dx.doi.org/10.1209/0295-5075/88/57003
Abstract
We study resonant transport through a superconducting double-barrier structure. At each barrier, due to the proximity effect, an incident electron can either reflect as an electron or a hole (Andreev reflection). Similarly, transport across the barrier can occur via direct tunneling as electrons as well as via the crossed Andreev channel, where a hole is transmitted. In the subgap regime, for a symmetric double-barrier system (with low transparency for each barrier), we find a new T=1/4 resonance (T is the transmission probability for electrons incident on the double-barrier structure) due to interference between electron and hole wave functions between the two barriers, in contrast to a normal double-barrier system which has the standard transmission resonance at T=1. We also point out as an application that the resonant value of T=1/4 can produce pure spin current through the superconducting double-barrier structure.
Item Type: | Article |
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Source: | Copyright of this article belongs to European Physical Society. |
ID Code: | 109461 |
Deposited On: | 01 Feb 2018 05:12 |
Last Modified: | 01 Feb 2018 05:12 |
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