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 (19)

• Spintronics: Fundamentals and applications
• Anomalous Hall effect
• Spin Hall effect
• Universal Intrinsic Spin-Hall Effect
• Dissipationless Quantum Spin Current at Room Temperature
• Spin Caloritronics
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Spatial imaging of the spin Hall effect and current-induced polarization in two-dimensional electron gases
• Theory of Spin Hall conductivity in n-doped GaAs
• Spin Relaxation Anisotropy in Two-Dimensional Semiconductor Systems
• Spin Hall Effect in Doped Semiconductor Structures
• Spin Nernst effect and Nernst effect in two-dimensional electron systems
• Spin-Hall effect: Back to the Beginning on a Higher Level
• Spin Nernst effect in the absence of a magnetic field
• Coulomb corrections to the extrinsic spin-Hall effect of a two-dimensional electron gas
• Side-jumps in the spin-Hall effect: construction of the Boltzmann collision integral
• Spin-Hall effect and spin-Coulomb drag in doped semiconductors
• Spin-Hall effect in a [110] quantum well
• Semiclassical kinetic theory of electron spin relaxation in semiconductors

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