The flux-flow Hall effect in type II superconductors. An explanation of the sign reversal

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00682008· OSTI ID:7012936

Kopnin, N B; Ivlev, B I; Kalatsky, V A ^[1]

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1. L. D. Landau Inst. for Theoretical Physics, Moscow (Russian Federation)

The authors consider a time-dependent Ginzburg-Landau (TDGL) model modified to take into account two mechanisms responsible for the Hall voltage in superconductors: the usual effect of the magnetic field on the normal current, and the vortex traction by the superflow. For the BCS model of superconductivity, the contribution of the vortex traction is proportional to the energy derivative of the quasiparticle density of states. Their theory gives the correct order of magnitude for the Hall angle in the mixed state. It predicts that the vortex-traction mechanism results in a negative Hall angle for the quasiparticle spectrum with a positive energy derivative of the density of states averaged over the Fermi surface, and vice versa. For the Fermi surface with a complicated shape, the sign of the Hall effect in the mixed state can be different from that in the normal state. If the signs are opposite, the Hall angle changes its signs as a function of the magnetic field below H[sub c2]. 24 refs., 1 fig.

• OSTI ID: 7012936
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 90:1-2; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BCS THEORY
DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
FLUID FLOW
GINZBURG-LANDAU THEORY
HALL EFFECT
HIGH-TC SUPERCONDUCTORS
MIXED STATE
PHYSICAL PROPERTIES
QUASI PARTICLES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS
VORTEX FLOW