Conserved spin current for the Mott relation
Mesoscale and Nanoscale Physics
2018-08-13 v4
Abstract
The conserved bulk spin current [Shi et al., Phys. Rev. Lett. 96, 076604 (2006)], defined as the time derivative of the spin displacement operator, ensures automatically the Onsager relation between the spin Hall effect (SHE) and the inverse SHE. Here, we reveal another desirable property of this conserved spin current: the Mott relation linking the SHE and its thermal counterpart, the spin Nernst effect (SNE). According to the Mott relation, the SNE is known once the SHE is understood. In a two-dimensional Dirac-Rashba system with a smooth scalar disorder potential, we find a sign change of the spin Nernst conductivity when tuning the chemical potential.
Keywords
Cite
@article{arxiv.1804.01288,
title = {Conserved spin current for the Mott relation},
author = {Cong Xiao and Jihang Zhu and Bangguo Xiong and Qian Niu},
journal= {arXiv preprint arXiv:1804.01288},
year = {2018}
}
Comments
5 pages, 1 figure