Bi-stability in single impurity Anderson model with strong electron-phonon interaction (polaron regime)
arXiv:1609.03749 · doi:10.1016/j.physb.2016.06.004
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.
References in corpus (4)
- Bistability signatures in nonequilibrium charge transport through molecular quantum dots
- Non-linear response of molecular junctions: The polaron model revisited
- Kondo effect and the fate of bistability in molecular quantum dots with strong electron-phonon coupling
- Multistable transport regimes and conformational changes in molecular quantum dots