Electron-electron scattering and transport properties of spin-orbit coupled electron gas

Abstract

We calculate the electrical and thermal conductivity of a two-dimensional electron gas with strong spin--orbit coupling in which the scattering is dominated by electron--electron collisions. Despite the apparent absence of Galilean invariance in the system, the two-particle scattering does not affect the electrical conductivity above the band-crossing point where both helicity bands are filled. Below the band-crossing point where one helicity band is empty, switching on the electron--electron scattering leads only to a limited decrease of the electrical conductivity, so that its high-temperature value is independent of the scattering intensity. In contrast to this, thermal conductivity is not strongly affected by the spin-orbit coupling and exhibits only a kink as the Fermi level passes through the band-crossing point.

9 pages, 6 figures

References in corpus (4)

• Three-particle collisions in quantum wires: Corrections to thermopower and conductance
• Thermal conductivity of a two-dimensional electron gas with Coulomb interaction
• Effects of Electron-Electron Scattering in Wide Ballistic Microcontacts
• Van Hove scenario of anisotropic transport in a two-dimensional spin-orbit coupled electron gas in an in-plane magnetic field

Cited by in corpus (7)

• Electron--electron scattering and conductivity of disordered systems with Galilean-invariant spectrum
• Interaction dominated transport in 2D conductors: from degenerate to partially-degenerate regime
• Resistivity of non-Galilean invariant two dimensional Dirac system
• Interaction-controlled transport in a two-dimensional massless-massive Dirac system: Transition from degenerate to nondegenerate regimes
• Finite-frequency response of Rasba electron gas with two-particle scattering
• Interactions-controlled magnetotransport in two-dimensional massless-massive fermion mixtures
• Rashba Spin-Orbit Coupling and Nonlocal Correlations in Disordered 2D Systems