Rectification in Luttinger liquids.
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.
Feldman
D E
DE
Department of Physics, Brown University, Providence, RI 02912, USA.
Scheidl
S
S
Vinokur
V M
VM