Observation of Thermoelectric Currents in High-Field Superconductor-Ferromagnet Tunnel Junctions

被引：110

作者：

Kolenda, S. ^{[1
]}

Wolf, M. J. ^{[1
]}

Beckmann, D. ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 09期

关键词：

SPIN IMBALANCE; SUPERCURRENTS; SPINTRONICS; INJECTION; ALUMINUM;

D O I：

10.1103/PhysRevLett.116.097001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the experimental observation of spin-dependent thermoelectric currents in superconductor-ferromagnet tunnel junctions in high magnetic fields. The thermoelectric signals are due to a spin-dependent lifting of the particle-hole symmetry, and are found to be in excellent agreement with recent theoretical predictions. The maximum Seebeck coefficient inferred from the data is about -100 mu V/K, much larger than commonly found in metallic structures. Our results directly prove the coupling of spin and heat transport in high-field superconductors.

引用

页数：5

共 48 条

[31] Micrometre-scale refrigerators [J].

Muhonen, Juha T. ;

Meschke, Matthias ;

Pekola, Jukka P. .

REPORTS ON PROGRESS IN PHYSICS, 2012, 75 (04)

[32] Superconductor-ferromagnet tunneling measurements indicate sp-spin and d-spin currents -: art. no. 060402 [J].

Münzenberg, M ;

Moodera, JS .

PHYSICAL REVIEW B, 2004, 70 (06) :060402-1

[33] Predicted Very Large Thermoelectric Effect in Ferromagnet-Superconductor Junctions in the Presence of a Spin-Splitting Magnetic Field [J].

Ozaeta, A. ;

Virtanen, P. ;

Bergeret, F. S. ;

Heikkila, T. T. .

PHYSICAL REVIEW LETTERS, 2014, 112 (05)

[34] Quasiparticle spin resonance and coherence in superconducting aluminium [J].

Quay, C. H. L. ;

Weideneder, M. ;

Chiffaudel, Y. ;

Strunk, C. ;

Aprili, M. .

NATURE COMMUNICATIONS, 2015, 6

[35] Spin imbalance and spin-charge separation in a mesoscopic superconductor [J].

Quay, C. H. L. ;

Chevallier, D. ;

Bena, C. ;

Aprili, M. .

NATURE PHYSICS, 2013, 9 (02) :84-88

[36] Controlled Injection of Spin-Triplet Supercurrents into a Strong Ferromagnet [J].

Robinson, J. W. A. ;

Witt, J. D. S. ;

Blamire, M. G. .

SCIENCE, 2010, 329 (5987) :59-61

[37]

Senapati K, 2011, NAT MATER, V10, P849, DOI [10.1038/nmat3116, 10.1038/NMAT3116]

[38]

Shelly C. D., ARXIV150807249

[39] Long-Range Spin Accumulation from Heat Injection in Mesoscopic Superconductors with Zeeman Splitting [J].

Silaev, M. ;

Virtanen, P. ;

Bergeret, F. S. ;

Heikkila, T. T. .

PHYSICAL REVIEW LETTERS, 2015, 114 (16)

[40]

Slachter A, 2010, NAT PHYS, V6, P879, DOI [10.1038/nphys1767, 10.1038/NPHYS1767]

← 1 2 3 4 5 →