Journal of University of Chinese Academy of Sciences >
Spin conductance in ferromagnet/quantum dot/superconductor junctions
Received date: 2013-04-26
Revised date: 2013-05-03
Online published: 2014-01-15
Supported by
Supported by National Natural Science Foundation of China(10874241)
We analyze the spin transport in a ferromagnet/quantum dot/superconductor junction by assuming spin-flip interaction on the quantum dot. The nonequilibrium Green's function method is employed to calculate the tunneling spin current and spin conductance. It is shown that the spin conductance depends sensitively on the orientation of exchange field in the ferromagnet, leading to a controllable giant spin tunneling magnetoresistance effect, even in the moderate temperature and spin polarization regime.
NING Wenting , JIN Biao . Spin conductance in ferromagnet/quantum dot/superconductor junctions[J]. Journal of University of Chinese Academy of Sciences, 2014 , 31(1) : 17 -23 . DOI: 10.7523/j.issn.2095-6134.2014.01.004
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