Bias induced circular spin current: Effects of environmental dephasing and disorder
Abstract
Analogous to circular spin current in an isolated quantum loop, bias induced spin circular current can also be generated under certain physical conditions in a nanojunction having single and/or multiple loop geometries which we propose first time, to the best of our concern, considering a magnetic quantum system. The key aspect of our work is the development of a suitable theory for defining and analyzing circular spin current in presence of environmental dephasing and impurities. Unlike transport current in a conducting junction, circular current may enhance significantly in presence of disorder and phase randomizing processes. Our analysis provides a new spin dependent phenomenon, and can give important signatures in designing suitable spintronic devices as well as selective spin regulations.
Keywords
Cite
@article{arxiv.1906.07025,
title = {Bias induced circular spin current: Effects of environmental dephasing and disorder},
author = {Moumita Patra and Santanu K. Maiti},
journal= {arXiv preprint arXiv:1906.07025},
year = {2019}
}
Comments
Thoroughly revised and extended version. Accepted for publication in Physical Review B