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

共 70 条

[1] Seebeck effects in two-dimensional spin transistors [J].

Alomar, M. I. ;

Serra, Llorenc ;

Sanchez, David .

PHYSICAL REVIEW B, 2015, 91 (07)

[2] Graphene: Electronic and Photonic Properties and Devices [J].

Avouris, Phaedon .

NANO LETTERS, 2010, 10 (11) :4285-4294

[3] Spin-orbit proximity effect in graphene [J].

Avsar, A. ;

Tan, J. Y. ;

Taychatanapat, T. ;

Balakrishnan, J. ;

Koon, G. K. W. ;

Yeo, Y. ;

Lahiri, J. ;

Carvalho, A. ;

Rodin, A. S. ;

O'Farrell, E. C. T. ;

Eda, G. ;

Castro Neto, A. H. ;

Oezyilmaz, B. .

NATURE COMMUNICATIONS, 2014, 5

[4] Graphene Photonics, Plasmonics, and Broadband Optoelectronic Devices [J].

Bao, Qiaoliang ;

Loh, Kian Ping .

ACS NANO, 2012, 6 (05) :3677-3694

[5] Spin Seebeck effect and thermoelectric phenomena in superconducting hybrids with magnetic textures or spin-orbit coupling [J].

Bathen, Marianne Etzelmuller ;

Linder, Jacob .

SCIENTIFIC REPORTS, 2017, 7

[6] Specular andreev Reflection in graphene [J].

Beenakker, C. W. J. .

PHYSICAL REVIEW LETTERS, 2006, 97 (06)

[7] Colloquium: Andreev reflection and Klein tunneling in graphene [J].

Beenakker, C. W. J. .

REVIEWS OF MODERN PHYSICS, 2008, 80 (04) :1337-1354

[8] Tunable anomalous Andreev reflection and triplet pairings in spin-orbit-coupled graphene [J].

Beiranvand, Razieh ;

Hamzehpour, Hossein ;

Alidoust, Mohammad .

PHYSICAL REVIEW B, 2016, 94 (12)

[9] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION [J].

BLONDER, GE ;

TINKHAM, M ;

KLAPWIJK, TM .

PHYSICAL REVIEW B, 1982, 25 (07) :4515-4532

[10]

Bonaccorso F, 2010, NAT PHOTONICS, V4, P611, DOI [10.1038/NPHOTON.2010.186, 10.1038/nphoton.2010.186]

← 1 2 3 4 5 6 7 →