We study the negative correction to the quantized value 2e2/h of the conductance of a quantum point contact due to the backscattering of electrons by acoustic phonons. The correction shows activated temperature dependence and also gives rise to a zero-bias anomaly in conductance. Our results are in qualitative agreement with recent experiments studying the 0.7 feature in the conductance of quantum point contacts.
@article{arxiv.cond-mat/0211579,
title = {Electron-phonon scattering in quantum point contacts},
author = {Georg Seelig and K. A. Matveev},
journal= {arXiv preprint arXiv:cond-mat/0211579},
year = {2009}
}