Net current generation in a 1D quantum ring at zero magnetic field

Details Net current generation in a 1D quantum ring at zero magnetic field Net current generation in a 1D quantum ring at zero magnetic field

2004-02-24

arxiv.org/abs/cond-mat/0402582v1

Physica E27, 278 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

LaTeX 4 pages with 6 embedded postscript figures

Scientific paper

10.1016/j.physe.2004.12.002

We study a non-adiabatic excitation of an electron system in a 1D quantum ring radiated by a short THz pulse. The response of two models, a continuous and discrete, is explored. By introducing a spatial asymmetry in the external perturbation a net current can be generated in the ring at a zero magnetic field. Effect of impurities and ratchets are investigated in combination with symmetric and asymmetric external excitation.

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