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arXiv 0704.1970cond-mat.str-elcond-mat.supr-con
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量子临界点附近的热电响应:CeCoIn5的情况

Thermoelectric response near a quantum critical point: the case of CeCoIn5

K. Izawa, K. Behnia, Y. Matsuda, H. Shishido, R. Settai, Y. Onuki, J. Flouquet

摘要:

我们提出了一个研究的热电系数CeCoIn_5下降到0.1 K和高达16 T,以探测量子临界的热电签名。在附近的场诱导量子临界点,能斯特系数nu表现出显着的增强没有饱和下降到最低的测量温度。Seebeck系数与电子比热的无量纲比值在准粒子形成的阈值附近出现最小值。在接近T_c(H)的涡旋液态下,能斯特系数表现出与其它超导体和标准涡旋动力学相反的令人困惑的特性。

英文摘要:

We present a study of thermoelectric coefficients in CeCoIn_5 down to 0.1 K and up to 16 T in order to probe the thermoelectric signatures of quantum criticality. In the vicinity of the field-induced quantum critical point, the Nernst coefficient nu exhibits a dramatic enhancement without saturation down to lowest measured temperature. The dimensionless ratio of Seebeck coefficient to electronic specific heat shows a minimum at a temperature close to threshold of the quasiparticle formation. Close to T_c(H), in the vortex-liquid state, the Nernst coefficient behaves anomalously in puzzling contrast with other superconductors and standard vortex dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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