Quantum tunneling theory of Cooper pairs as bosonic particles
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AbstractWe propose a simple phenomenological theory for quantum tunneling of Cooper pairs, in superconductor/insulator/superconductor tunnel junctions, for a regime where the system can be modeled as bosonic particles. Indeed, provided there is an absence of quasiparticle excitations (fermions), our model reveals a rapid increase in tunneling current, around zero bias voltage, which rapidly saturates. This manifests as a zero bias conductance peak that strongly depends on the superconductors temperature in a non-monotonic way. This low energy tunneling of Cooper pairs could serve as an alternative explanation for a number of tunneling experiments where zero bias conductance peak has been observed.
2000 ◽
Vol 69
(9)
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pp. 2743-2746
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2002 ◽
Vol 378-381
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pp. 316-319
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2006 ◽
Vol 54
(2)
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pp. 141-149
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2015 ◽
Vol 112
(3)
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pp. 651-656
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1998 ◽
Vol 44
(5)
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pp. 648-654
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