Bi-stability in single impurity Anderson model with strong electron-phonon interaction (polaron regime)
Mesoscale and Nanoscale Physics
2016-09-14 v1
Abstract
We consider a single impurity Anderson model (SIAM) in which the quantum dot(QD) is strongly coupled to a phonon bath in polaron regime. This coupling results in an effective e-e attraction. By computing the self energies using a current conserving approximation which is up to second order in this effective attraction, we show that if the interaction is strong enough, in non particle-hole(PH) symmetric case, the system would be bi-stable and we have hysteresis loop in the I-V characteristic. Moreover, the system shows negative differential conductance in some bias voltage intervals.
Keywords
Cite
@article{arxiv.1609.03749,
title = {Bi-stability in single impurity Anderson model with strong electron-phonon interaction (polaron regime)},
author = {Amir Eskandari-asl},
journal= {arXiv preprint arXiv:1609.03749},
year = {2016}
}