Quantum Hall effects in layered disordered superconductors.


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 sigma(spin)(xy)=0,2 separated by a spin metal phase. We identify a spin metal-insulator localization exponent as well as a spin conductivity exponent of approximately 0.96. In the presence of a Zeeman term an additional sigma(spin)(xy)=1 phase appears.

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@article{Kagalovsky2004QuantumHE, title={Quantum Hall effects in layered disordered superconductors.}, author={Victor Kagalovsky and Baruch Horovitz and Yshai Avishai}, journal={Physical review letters}, year={2004}, volume={93 24}, pages={246802} }