Screening in Non - Equilibrium Dissipative System 1 JIAJUN

Submitted for the MAR14 Meeting of The American Physical Society Screening in Non-Equilibrium Dissipative System1 JIAJUN LI, JONG HAN, State Univ of NY Buffalo — Effect of screening is one crucial property of interacting electrons. However, it is still not completely understood in nonequilibrium dissipative system, partly due to a lack of convenient theoretical tool. It is recently shown that a DC-driven lattice attached to fermionic reservoirs [1,2] reproduces major physical properties of real system, and is accessible by comprehensive theoretical study even in strong field and correlated electron region. In this presentation, we will show a study of electronic screening within this model. First of all, current distribution out of impurities will be shown in steady-state non-equilibrium. With parameters changing in the regimes of linear and high-field, DC current shows distinctly different patterns, reflecting the underlying interplay between quantum dissipation and non-equilibrium physics. In addition, the density-density correlation function is calculated and RPA is used to study dielectric screening. The electronhole excitation spectrum will be presented, which indicates interesting physics while fermionic dissipation, Coulomb interaction and external field compete with each other. [1] J. E. Han, Phys. Rev. B 87, 085119 (2013) [2] J. E. Han, J. Li, Phys. Rev. B 88, 075113 (2013) 1Supported by NSF DMR-0907150. Jiajun Li State Univ of NY Buffalo Date submitted: 15 Nov 2013 Electronic form version 1.4