Quantum Hall Effects in Layered Disordered Superconductors
V. Kagalovsky, B. Horovitz, Y. Avishai
DOI 10.1103/PhysRevLett.93.246802 · Physical Review Letters
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Abstract
Layered singlet paired superconductors with disorder and broken time reversal symmetry are studied, demonstrating a phase diagram with charge-spin separation in transport. In terms of the average intergrain transmission and the interlayer tunneling we find quantum Hall phases with spin Hall coefficients of σxyspin=0,2 separated by a spin metal phase. We identify a spin metal-insulator localization exponent as well as a spin conductivity exponent of ≈0.96. In the presence of a Zeeman term an additional σxyspin=1 phase appears.
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