Flux-flow Hall effect in clean type-II superconductors

N. B. Kopnin; A. V. Lopatin

doi:10.1103/PhysRevB.51.15291

← Back to search

Flux-flow Hall effect in clean type-II superconductors

N. B. Kopnin, A. V. Lopatin

DOI 10.1103/PhysRevB.51.15291 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We calculate the Ohmic and Hall components of the flux-flow conductivity for clean superconductors in a magnetic field H≪Hc2 and investigate the sign of the Hall effect. Each component of the conductivity consists of two contributions: from electrons localized in the vortex cores, and from electrons above the gap. These contributions are determined by the parameters ω0τ and ωcτ, respectively, where ω0∼Δ2/EF is the distance between the energy levels in the vortex core, ωc is the cyclotron frequency (ωc≪ω0), and τ is the relaxation time. In the superclean limit, τ≫EF/Δ2, the Ohmic component is small and the Hall conductivity resembles that for the high-field regime in a normal metal. In a moderately clean case, Δ−1≪τ≪EF/Δ2, the Hall component is small. Its sign in the mixed state may differ from the sign in the normal state depending on the detailed structure of the Fermi surface. We conclude that the sign reversal can be intrinsic. We discuss implications of our results for mutual friction in superfluid B3.