Temperature dependence of spin currents in one- and three-dimensional insulators
Abstract
The temperature dependence of spin currents in insulators at the finite temperature near zero Kelvin is theoretically studied. The spin currents are carried by Jordan-Wigner fermions and magnons in one- and three- dimensional insulators. The quasiparticle description of one-dimensional spin systems is valid only in the finite temperature near zero Kelvin. These spin currents are generated by the external magnetic field gradient along the quantization axis and also by the two-particle interaction gradient. In one-dimensional insulators, quantum fluctuations are strong and the spin current carried by Jordan-Wigner fermions shows the stronger dependence on temperatures than the one by magnons.
Keywords
Cite
@article{arxiv.1107.5867,
title = {Temperature dependence of spin currents in one- and three-dimensional insulators},
author = {Kouki Nakata},
journal= {arXiv preprint arXiv:1107.5867},
year = {2012}
}
Comments
11 pages, 2 tables, accepted for publication in Int.J.Mod.Phys.B