Extrinsic spin Nernst effect in two-dimensional electron systems

Abstract

The spin accumulation due to the spin current induced by the perpendicular temperature gradient (the spin Nernst effect) is studied in a two-dimensional electron system (2DES) with spin-orbit interaction by employing the Boltzmann equation. The considered 2DES is confined within a symmetric quantum well with delta doping at the center of the well. A symmetry consideration leads to the spin-orbit interaction which is diagonal in the spin component perpendicular to the 2DES. As origins of the spin current, the skew scattering and the side jump are considered at each impurity on the center plane of the well. It is shown that, for repulsive impurity potentials, the spin-Nernst coefficient changes its sign at the impurity density where contributions from the skew scattering and the side jump cancel each other out. This is in contrast to the spin Hall effect in which the sign change of the coefficient occurs for attractive impurity potentials.

8 pages, 1 figure

References in corpus (5)

• Dissipationless Quantum Spin Current at Room Temperature
• Spin Caloritronics
• Theory of Spin Hall conductivity in n-doped GaAs
• Spin Nernst effect and Nernst effect in two-dimensional electron systems
• Spin-Hall effect in a [110] quantum well

Cited by in corpus (7)

• Supplemental Material to "A first-principles linear response description of the spin Nernst effect"
• Berry-phase effects in dipole density and Mott relation
• A first-principles linear response description of the spin Nernst effect
• Spin Hall and spin Nernst effects in a two-dimensional electron gas with Rashba spin-orbit interaction: temperature dependence
• Photon-induced tunability of the thermospin current in a Rashba ring
• Spin relaxation in a zinc-blende (110) symmetric quantum well with delta-doping
• Intrinsic spin Nernst effect in topological Dirac and magnetic Weyl semimetals