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arXiv · 1906.07025

Bias induced circular spin current: Effects of environmental dephasing and disorder

Moumita Patra·Santanu K. Maiti
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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.

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Moumita Patra, Santanu K. Maiti. 2019-09-25. Bias induced circular spin current: Effects of environmental dephasing and disorder. https://doi.org/10.1103/physrevb.100.165408

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