Quantum Hall effects in layered disordered superconductors

Details Quantum Hall effects in layered disordered superconductors Quantum Hall effects in layered disordered superconductors

2004-03-08

arxiv.org/abs/cond-mat/0403207v1

Phys. Rev. Lett. 93, 246802 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.93.246802

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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