Perturbative theory of the non-equilibrium singlet-triplet transition

Details Perturbative theory of the non-equilibrium singlet-triplet transition Perturbative theory of the non-equilibrium singlet-triplet transition

2009-09-02

arxiv.org/abs/0909.0441v1

Journal of Physics: Conference Series 200 (2010) 012063

Physics

Condensed Matter

Strongly Correlated Electrons

Contribution to the proceedings of ICM2009 (International Conference on Magnetism)

Scientific paper

10.1088/1742-6596/200/1/012063

We study equilibrium and non-equilibrium properties of a two-level quantum dot close to the singlet-triplet transition. We treat the on-site Coulomb interaction and Hund's rule coupling perturbatively within the Keldysh formalism. We compute the spectral functions and the differential conductance of the dot. For moderate interactions our perturbative approach captures the Kondo effect and many of the experimentally observed properties.

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