Quantum Pumping in the Magnetic Field: Role of Discrete Symmetries

Details Quantum Pumping in the Magnetic Field: Role of Discrete Symmetries Quantum Pumping in the Magnetic Field: Role of Discrete Symmetries

2000-05-03

arxiv.org/abs/cond-mat/0005077v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages

Scientific paper

10.1103/PhysRevB.62.10373

We consider an effect of the discrete spatial symmetries and magnetic field on the adiabatic charge pumping in mesoscopic systems. In general case, there is no symmetry of the pumped charge with respect to the inversion of magnetic field Q(B) \neq Q(-B). We find that the reflection symmetries give rise to relations Q(B)=Q(-B) or Q(B)=-Q(-B) depending on the orientation of the reflection axis. In presence of the center of inversion, Q(B) = 0. Additional symmetries may arise in the case of bilinear pumping.

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