Ratchet effects in Luttinger liquids
Abstract
We investigate a onedimensional electron liquid with two point scatterers of different strength. In the presence of electron interactions, the nonlinear conductance is shown to depend on the current direction. The resulting asymmetry of the transport characteristic gives rise to a ratchet effect, i.e., the rectification of a dc current for an applied ac voltage. In the case of strong repulsive interactions, the ratchet current grows in a wide voltage interval with decreasing ac voltage. In the regime of weak interaction the currentvoltage curve exhibits oscillatory behavior. Our results apply to singleband quantum wires and to tunneling between quantum Hall edges.
 Publication:

arXiv eprints
 Pub Date:
 September 2003
 DOI:
 10.48550/arXiv.condmat/0309512
 arXiv:
 arXiv:condmat/0309512
 Bibcode:
 2003cond.mat..9512F
 Keywords:

 Condensed Matter  Mesoscopic Systems and Quantum Hall Effect;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 6 pages LaTeX, 1 eps figure