Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-11-29
Phys. Rev. B 85 , 144304 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 7 figures
Scientific paper
10.1103/PhysRevB.85.144304
Using a variational numerical method we compute the time-evolution of the Holstein-Hubbard bipolaron from its ground state when at t=0 the constant electric field is switched on. The system is evolved taking into account full quantum effects until it reaches a quasi-stationary state. In the zero-field limit the current shows Bloch oscillations characteristic for the adiabatic regime where the electric field causes the bipolaron to evolve along the quasiparticle band. Bipolaron remains bound and the net current remains zero in this regime. At larger electric fields the system enters the dissipative regime with a finite steady-state current. Concomitantly, the bipolaron dissociates into two separate polarons. By examining different parameter regimes we show that the appearance of a finite steady-state current is inevitably followed by the dissociation of the bipolaron.
Bonča Janez
Golež D.
Vidmar Lev
No associations
LandOfFree
Dissociation of a Hubbard--Holstein bipolaron driven away from equilibrium by a constant electric field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dissociation of a Hubbard--Holstein bipolaron driven away from equilibrium by a constant electric field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dissociation of a Hubbard--Holstein bipolaron driven away from equilibrium by a constant electric field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-15007