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Interaction effects in multi-subband quantum wires

Arisato Kawabata·Tobias Brandes
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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.

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Arisato Kawabata, Tobias Brandes. 1996-10-30. Interaction effects in multi-subband quantum wires. https://doi.org/10.1143/jpsj.65.3712

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