Nonlinear conductivity of two-dimensional Coulomb glasses

Details Nonlinear conductivity of two-dimensional Coulomb glasses Nonlinear conductivity of two-dimensional Coulomb glasses

2011-01-31

arxiv.org/abs/1101.5925v1

Physical Review B, 82, 134204 (2010)

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 9 figures

Scientific paper

10.1103/PhysRevB.82.134204

We have studied the nonlinear conductivity of two-dimensional Coulomb glasses. We have used a Monte Carlo algorithm to simulate the dynamic of the system under an applied electric field $E$. We found that in the nonlinear regime the site occupancy in the Coulomb gap follows a Fermi-Dirac distribution with an effective temperature $T_{\rm eff}$, higher than the phonon bath temperature $T$. The value of the effective temperature is compatible with that obtained for slow modes from the generalized fluctuation-dissipation theorem. The nonlinear conductivity for a given electric field and $T$ is fairly similar to the linear conductivity at the corresponding $T_{\rm eff}$. We found that the dissipated power and the effective temperature are related by an expression of the form $(T_{\rm eff}^\alpha-T^\alpha)T_{\rm eff}^{\beta-\alpha}$.

Affiliated with

Also associated with

No associations

Rating

Nonlinear conductivity of two-dimensional Coulomb glasses 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 Nonlinear conductivity of two-dimensional Coulomb glasses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonlinear conductivity of two-dimensional Coulomb glasses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-647611