Giant Nernst and Hall effects due to chiral superconducting fluctuations
Giant Nernst and Hall effects due to chiral superconducting fluctuations
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DOI：
10.1103/physrevb.90.184518
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发表时间：
2014-03
影响因子：
3.7
通讯作者：
H. Sumiyoshi;S. Fujimoto
中科院分区：
文献类型：
--
作者：
H. Sumiyoshi;S. Fujimoto
我们考虑的能斯特和霍尔效应的手征超导体的波动制度以上的转变温度，提出了不是由传统的洛伦兹力，但由于Bogoliubov-de Gennes哈密顿量的Berry相的波动的非对称散射。结果发现，这些效果可以比传统的清洁样品，表现出定性不同的行为更显着。这些结果为最近在一个干净的URu_2Si_2 $样品中能斯特效应的实验观察提供了系统和全面的理解，该样品被认为是一个手征超导体。
We consider the Nernst and Hall effects in fluctuation regime of chiral superconductors above transition temperatures, that are raised not by conventional Lorentz force, but by asymmetric scattering due to fluctuations of the Berry phase of the Bogoliubov-de Gennes Hamiltonian. It is found that these effects can be more significant than conventional ones for cleaner samples, exhibiting qualitatively distinct behaviors. The results provide systematic and comprehensive understanding for recent experimental observations of the Nernst effect in a clean URu$_2$Si$_2$ sample, which is suggested to be a chiral superconductor.