Hall conductivity near the z=2 Superconductor-Insulator transition in two dimensions
Denis Dalidovich, Philip Phillips
DOI 10.1103/PhysRevB.66.073308 · Physical Review B
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Abstract
We analyze here the behavior of the Hall conductivity σxy near a z=2 insulator-superconductor quantum critical point in a perpendicular magnetic field. We show that the form of the conductivity is sensitive to the presence of dissipation η, and depends nonmonotonically on H once η is weak enough. σxy passes through a maximum at H∼ηT in the quantum critical regime, suggesting that the limits H→0 and η→0 do not commute.
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