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Phys Rev Lett. 2012 Apr 13;108(15):157001. Epub 2012 Apr 9.

Intrinsic Hall effect in a multiband chiral superconductor in the absence of an external magnetic field.

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1
Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada.

Abstract

We identify an intrinsic Hall effect in multiband chiral superconductors in the absence of a magnetic field (i.e., an anomalous Hall effect). This effect arises from interband transitions involving time-reversal symmetry-breaking chiral Cooper pairs. We discuss the implications of this effect for the putative chiral p-wave superconductor, Sr2RuO4, and show that it can contribute significantly to Kerr rotation experiments. Since the magnitude of the effect depends on the structure of the order parameter across the bands, this result may be used to distinguish between different models proposed for the superconducting state of Sr2RuO4.

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