Analogous to circular spin current in an isolated quantum loop, bias-induced circular spin current can also be generated under certain physical conditions in a nanojunction having single- and/or multiple-loop geometries which we propose, for the first time, considering a magnetic quantum system. The key aspect of our work is the development of a suitable theory for defining and analyzing circular spin currents in presence of environmental dephasing and impurities. Unlike a transport current in a conducting junction, a circular current may enhance significantly in presence of disorder and phase randomizing processes.
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