Observation of Thermoelectric Currents in High-Field Superconductor-Ferromagnet Tunnel Junctions
Observation of Thermoelectric Currents in High-Field Superconductor-Ferromagnet Tunnel Junctions
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DOI：
10.1103/physrevlett.116.097001
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发表时间：
2016-03-01
影响因子：
8.6
通讯作者：
Beckmann, D.
中科院分区：
文献类型：
--
作者：
Kolenda, S.;Wolf, M. J.;Beckmann, D.
本文报道了在强磁场中超导-铁磁隧道结中自旋相关热电流的实验观测。热电信号是由于自旋相关的粒子-空穴对称性的提升，并被发现与最近的理论预测非常一致。从数据推断的最大塞贝克系数约为-100 μ V/K，比通常在金属结构中发现的大得多。我们的结果直接证明了高场超导体中自旋和热输运的耦合。
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.