Photovoltaic effect in bent quantum wires

Details Photovoltaic effect in bent quantum wires Photovoltaic effect in bent quantum wires

2005-07-29

arxiv.org/abs/cond-mat/0507698v1

Phys. Rev. B 72, 195340 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.72.195340

We propose a scheme for the generation of photocurrent in bent quantum wires. We calculate the current using a generalized Landauer-Buttiker approach that takes into account the electromagnetic radiation. For circularly polarized light, we find that the curvature in the bent wire induces an asymmetry in the scattering coefficients for left and right moving electrons. This asymmetry results in a current at zero bias voltage. The effect is due to the geometry of the wire which transforms the photon angular momentum into translational motion for the electrons.

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