Control of heat transport in quantum spin systems
Mesoscale and Nanoscale Physics
2009-11-13 v1
Abstract
We study heat transport in quantum spin systems analytically and numerically. First, we demonstrate that heat current through a two-level quantum spin system can be modulated from zero to a finite value by tuning a magnetic field. Second, we show that a spin system, consisting of two dissimilar parts - one is gapped and the other is gapless, exhibits current rectification and negative differential thermal resistance. Possible experimental realizations by using molecular junctions or magnetic materials are discussed.
Cite
@article{arxiv.0807.4575,
title = {Control of heat transport in quantum spin systems},
author = {Yonghong Yan and Chang-Qin Wu and Baowen Li},
journal= {arXiv preprint arXiv:0807.4575},
year = {2009}
}