Regensburg 2004 – scientific programme

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HL: Halbleiterphysik

HL 47: Quantendr
ähte und Korrelationseffekte

HL 47.2: Talk

Friday, March 12, 2004, 11:15–11:30, H15

Inducing field-free currents in mesoscopic rings — •Alex Matos-Abiague and Jamal Berakdar — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

We show theoretically that a sequence of two orthogonal linearly polarized half-cycle pulses applied to a mesoscopic ballistic ring may induce a non-equilibrium current. The post-pulses (and therefore field-free) current lasts as long as the coherence is preserved. The dependence of the sign and amplitude of the current on the different system parameters is studied. The possibility of experimentally detecting the post-pulse current is also discussed.