Rectification in Luttinger liquids |
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Authors: | Feldman D E Scheidl S Vinokur V M |
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Institution: | Department of Physics, Brown University, Providence, RI 02912, USA. |
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Abstract: | We investigate the rectification of an ac bias in Luttinger liquids in the presence of an asymmetric potential (the ratchet effect). We show that a strong repulsive electron interaction enhances the ratchet current in comparison with Fermi-liquid systems, and the dc I-V curve is strongly asymmetric in the low-voltage regime even for a weak asymmetric potential. At higher voltages the ratchet current exhibits an oscillatory voltage dependence. |
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