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Quantum Hall effects in layered disordered superconductors

V. Kagalovsky·B. Horovitz·Y. Avishai
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Abstract

Layered singlet paired superconductors with disorder and broken time reversal symmetry are studied. The phase diagram demonstrates charge-spin separation in transport. In terms of the average intergrain transmission and the interlayer tunnelling we find quantum Hall phases with spin Hall coefficients of 0 and 2 separated by a spin metal phase. We identify a spin metal-insulator localization exponent as well as a spin conductivity exponent of ~0.9. In presence of a Zeeman term an additional phase with spin Hall coefficient of 1 appears.

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V. Kagalovsky, B. Horovitz, Y. Avishai. 2004-03-08. Quantum Hall effects in layered disordered superconductors. https://doi.org/10.1103/physrevlett.93.246802

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