Mean-field results on the Anderson impurity model out of equilibrium

Details Mean-field results on the Anderson impurity model out of equilibrium Mean-field results on the Anderson impurity model out of equilibrium

2004-02-18

arxiv.org/abs/cond-mat/0402469v1

Phys. Rev. B 69, 153102 (2004).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures (eps files); to appear in PRB Brief Reports

Scientific paper

10.1103/PhysRevB.69.153102

We investigate the mean-field phase diagram of the Anderson impurity model out of equilibrium. Generalising the unrestricted Hartree-Fock approach to the non-equilibrium situation we derive and analyse the system of equations defining the critical surface separating the magnetic regime from the non-magnetic one. An exact analytic solution for the phase boundary as a function of the applied voltage is found in the symmetric case. Surprisingly, we find that as soon as there is an asymmetry, even small, between the contacts, no finite voltage is able to destroy the magnetic regime which persists at arbitrary high voltages.

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