Spin triplet Andreev reflection induced by interface spin-orbit coupling in half-metal/superconductor junctions |
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Authors: | B Lv |
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Institution: | 1.School of Physics,Peking University,Beijing,P.R. China |
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Abstract: | We show that with interface spin-orbit coupling, triplet pairing can occur in the
half-metal/superconductor junction. The tunneling conductance is different from the usual
Andreev reflection and strongly depends on the polarisation orientation. The probability
of triplet pairing for different incident angles and zero-biased conductance are also
calculated. The mechanism for the formation of the triplet pairing is that the interface
spin-orbit coupling provides an effective spin-flip barrier, which couples all the
transport modes in spin Nambu space. Because of its unique particle hole symmetry, this
spin-orbit coupling interface effect is different from the spin-flip ferromagnetic barrier
which induces zero-bias conductance vanishing and finite V-shape
conductance within the energy gap. |
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Keywords: | |
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