Giant Nernst effect in CeCoIn5 -: art. no. 217002

Giant Nernst effect in CeCoIn5 -: art. no. 217002
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DOI:
10.1103/physrevlett.92.217002
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发表时间:
2004-05-28
影响因子:
8.6
通讯作者:
Onuki, Y
Onuki, Y
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Bel, R;Behnia, K;Onuki, Y

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本文研究了重费米子超导体CeCoIn5的能思特系数和塞贝克系数。在18k以下,伴随着场相关的塞贝克系数,一个巨大的亚线性能斯特信号出现,其量级大大超过了多波段费米液态金属的预期。在混合状态下,与之前研究过的所有其他超导体不同,这个信号压倒了与超导涡旋运动有关的信号。结果表明,在强相互作用的电子中存在一种迄今未知的横向热电源。
We present a study of Nernst and Seebeck coefficients of the heavy-fermion superconductor CeCoIn5. Below 18 K, concomitant with a field-dependent Seebeck coefficient, a large sublinear Nernst signal emerges with a magnitude drastically exceeding what is expected for a multiband Fermi-liquid metal. In the mixed state, in contrast with all other superconductors studied before, this signal overwhelms the one associated with the motion of superconducting vortices. The results point to a hitherto unknown source of transverse thermoelectricity in strongly interacting electrons.