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arXiv · 1503.07174

A calculation for polar Kerr effect in high temperature cuprate superconductors

Gargee Sharma·Sumanta Tewari·Pallab Goswami·V. M. Yakovenko·Sudip Chakravarty
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Abstract

A mechanism is proposed for the tantalizing evidence of polar Kerr effect in a class of high temperature superconductors--the signs of the Kerr angle from two opposite faces of the same sample are identical and magnetic field training is non-existent. The mechanism does not break global time reversal symmetry, as in an antiferromagnet, and results in zero Faraday effect. It is best understood in a phenomenological model of bilayer cuprates, such as YBCO, in which intra-bilayer tunneling nucleates a chiral d-density wave such that the individual layers have opposite chirality. Although specific to the chiral d-density wave, the mechanism may be more general to any quasi-two-dimensional orbital antiferromagnet in which time reversal symmetry is broken in each plane, but not when averaged macroscopically.

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Gargee Sharma, Sumanta Tewari, Pallab Goswami, V. M. Yakovenko, Sudip Chakravarty. 2015-03-24. A calculation for polar Kerr effect in high temperature cuprate superconductors. https://doi.org/10.1103/physrevb.93.075156

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