Electron-phonon scattering in quantum point contacts.
We study the negative correction to the quantized value 2e(2)/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.
Seelig
Georg
G
Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland.
Matveev
K A
KA