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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 18
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Phys. Rev. Lett. 94, 186809 (2005) [4 pages]

Rectification in Luttinger Liquids

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D. E. Feldman1, S. Scheidl2, and V. M. Vinokur3
1Department of Physics, Brown University, Providence, Rhode Island 02912, USA
2Institut für Theoretische Physik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany
3Materials Science Division, Argonne National Laboratory, 9700 South Cass, Argonne, Illinois 60439, USA

Received 5 October 2004; published 12 May 2005

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.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.186809
DOI:
10.1103/PhysRevLett.94.186809
PACS:
73.63.Nm, 71.10.Pm
 
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