Spin-dependent thermoelectric effects in graphene-based superconductorjunctions

Spin-dependent thermoelectric effects in graphene-based superconductorjunctions

Using the Bogoliubov-de Gennes formalism, we investigate the charge and spin-dependentthermoelectriceffects in graphene-based superconductorjunctions. Theresults demonstrate that despite normal-superconductor junctions, there is atemperature-dependent spin thermopower in both the graphene-based ferr...

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Veröffentlicht in:Journal of applied physics 2017-02, Vol.121 (6)
1. Verfasser: Beiranvand Razieh
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Sprache:eng
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Applied physics
Chemical potential
Ferromagnetism
Graphene
Organic chemistry
Spin-orbit interactions
Superconductor junctions
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description Using the Bogoliubov-de Gennes formalism, we investigate the charge and spin-dependentthermoelectriceffects in graphene-based superconductorjunctions. Theresults demonstrate that despite normal-superconductor junctions, there is atemperature-dependent spin thermopower in both the graphene-based ferromagnetic-superconductorand ferromagnetic-Rashba spin-orbit region-superconductor junctions. It is also shownthat in the presence of Rashba spin-orbit interaction, the charge and spin-dependent Seebeckcoefficients reach their maximum up to 3.5 kB/e and 2.5 kB/e, respectively. Remarkably, these coefficients have azero-point critical value with respect to the magnetic exchange field and chemical potential. Thiseffectdisappears when the Rashba coupling is absent. These results suggest that graphene-basedsuperconductorscan be used in spin-caloritronic devices.
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Theresults demonstrate that despite normal-superconductor junctions, there is atemperature-dependent spin thermopower in both the graphene-based ferromagnetic-superconductorand ferromagnetic-Rashba spin-orbit region-superconductor junctions. It is also shownthat in the presence of Rashba spin-orbit interaction, the charge and spin-dependent Seebeckcoefficients reach their maximum up to 3.5 kB/e and 2.5 kB/e, respectively. Remarkably, these coefficients have azero-point critical value with respect to the magnetic exchange field and chemical potential. Thiseffectdisappears when the Rashba coupling is absent. 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It is also shownthat in the presence of Rashba spin-orbit interaction, the charge and spin-dependent Seebeckcoefficients reach their maximum up to 3.5 kB/e and 2.5 kB/e, respectively. Remarkably, these coefficients have azero-point critical value with respect to the magnetic exchange field and chemical potential. Thiseffectdisappears when the Rashba coupling is absent. 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Theresults demonstrate that despite normal-superconductor junctions, there is atemperature-dependent spin thermopower in both the graphene-based ferromagnetic-superconductorand ferromagnetic-Rashba spin-orbit region-superconductor junctions. It is also shownthat in the presence of Rashba spin-orbit interaction, the charge and spin-dependent Seebeckcoefficients reach their maximum up to 3.5 kB/e and 2.5 kB/e, respectively. Remarkably, these coefficients have azero-point critical value with respect to the magnetic exchange field and chemical potential. Thiseffectdisappears when the Rashba coupling is absent. These results suggest that graphene-basedsuperconductorscan be used in spin-caloritronic devices.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub></addata></record>
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Applied physics
Chemical potential
Ferromagnetism
Graphene
Organic chemistry
Spin-orbit interactions
Superconductor junctions
title Spin-dependent thermoelectric effects in graphene-based superconductorjunctions
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