Spin-dependent thermoelectric effects in graphene-based superconductor junctions

被引：12

作者：

Beiranvand, Razieh ^{[1
]}

Hamzehpour, Hossein ^{[1
,2
]}

机构：

[1] KN Toosi Univ Technol, Dept Phys, Tehran 158754416, Iran

[2] Inst Res Fundamental Sci IPM, Sch Phys, Tehran 193955531, Iran

来源：

JOURNAL OF APPLIED PHYSICS | 2017年 / 121卷 / 06期

基金：

美国国家科学基金会;

关键词：

MASSLESS DIRAC FERMIONS; SPINTRONICS; PHOTONICS; DEVICES; PHASE;

D O I：

10.1063/1.4976005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using the Bogoliubov-de Gennes formalism, we investigate the charge and spin-dependent thermoelectric effects in graphene-based superconductor junctions. The results demonstrate that despite normal-superconductor junctions, there is a temperature-dependent spin thermopower in both the graphene-based ferromagnetic-superconductor and ferromagnetic-Rashba spin-orbit region-superconductor junctions. It is also shown that in the presence of Rashba spin-orbit interaction, the charge and spin-dependent Seebeck coefficients reach their maximum up to 3.5 k(B)/e and 2.5 k(B)/e, respectively. Remarkably, these coefficients have a zero-point critical value with respect to the magnetic exchange field and chemical potential. This effect disappears when the Rashba coupling is absent. These results suggest that graphene-based superconductors can be used in spincaloritronic devices. Published by AIP Publishing.

引用

页数：10

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