Subgap conductance in ferromagnet-superconductor mesoscopic structures

Leadbeater, M. and Lambert, C. J. and Nagaev, K. E. and Raimondi, R. and Volkov, A. F. (1999) Subgap conductance in ferromagnet-superconductor mesoscopic structures. Physical review B, 59 (19). pp. 12264-12267. ISSN 0163-1829

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Abstract

We study the subgap conductance of a ferromagnetic mesoscopic region attached to a ferromagnetic and a superconducting electrode by means of tunnel junctions. In the absence of the exchange field, the ratio r = gamma/epsilon(T) Of the two-tunnel junction resistances determines the behavior of the subgap conductance, which possesses a zero-bias peak for r much greater than 1 and for r much less than 1 a peak at finite voltage. We show that the inclusion of the exchange field leads to a peak splitting for r much less than 1, while it shifts the zero-bias anomaly to finite voltages for r much greater than 1.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
58093
Deposited By:
Deposited On:
23 Oct 2012 09:11
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Apr 2020 02:16