Spin pump effects on the spin current through two coupled quantum dots
Tóm tắt
We theoretically study the spin pump effects of the rotating
magnetic field on the spin current through two coupled quantum dots.
Owing to the interdot coupling, two molecular states with different
bands can be formed, resulting asymmetric spin current peaks. The
possibility of manipulating the spin current is explored by tuning
the strength, the frequency, and the direction of the rotating
magnetic field. The number and location of the spin current peaks
can be controlled by making use of various tunings. Furthermore, the
normal 2π period of the spin current with respect to the
magnetic flux can be destroyed by the interdot coupling.
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