Finite bias conductance of an Anderson level: A source-Liouville Hartree–Fock study

Abstract

We address the problem of stationary conductance through an Anderson spin-degenerate level at finite bias. Just as in the Anderson solution, for a finite bias in parameter space (bias, gate voltage, interaction constant, and the couplings to the leads) there exist spin-polarized and non-spin-polarized regions. The transition curve between them is found analytically for the case of symmetric coupling to the left and right leads. We approach the problem by a non-Markovian source-Liouville equation where the two-body interaction self-energies are taken in the Hartree-Fock approximation.

Influence of Coherent Tunneling and Incoherent Hopping on the Charge Transfer Mechanism in Linear Donor–Bridge–Acceptor Systems

“…The quantum master equation (QME) approach is used to investigate the time-dependence of polaron formation, time-dependent population dynamics, and transfer rate. − This approach has been used to study the dynamics of a system coupled to a thermal bath ,, and is based on second-order perturbation theory in the system–bath coupling. Other approaches include the nonequilibrium Green’s function approach (NEGF), which has the advantage of being formally exact within the electron–vibration coupling.…”