Interaction effects in multi-subband quantum wires
arXiv:cond-mat/9610211 · doi:10.1143/JPSJ.65.3712
Abstract
We investigate the effect of electron-electron interactions on the transport properties of disordered quasi one-dimensional quantum wires with two or more subbands occupied. We apply two alternative methods to solve the logarithmic divergent problem, namely the parquet graph theory and a renormalization group calculation. We solve the group equations analytically in the weak coupling limit and find a power-law for the temperature dependent conductivity of a multi-channel system. The exponent is roughly equal to the inverse of the number of the occupied subbands.
4 pages, style-files included. No figure. Appears in J. Phys. Soc. Japan (Letter)