Non-Equilibrium Kondo Model with Voltage Bias in a Magnetic Field

Details Non-Equilibrium Kondo Model with Voltage Bias in a Magnetic Field Non-Equilibrium Kondo Model with Voltage Bias in a Magnetic Field

2009-03-16

arxiv.org/abs/0903.2865v1

Phys. Rev. B 81, 035113 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

19 pages, 11 figures

Scientific paper

We derive a consistent 2-loop scaling picture for a Kondo dot in both equilibrium and non-equilibrium situations using the flow equation method. Our analysis incorporates the important decoherence effects from both thermal and non-equilibrium noise in a common setting. We calculate the spin-spin correlation function, the T-matrix, and the magnetization as functions of applied magnetic field, dc-voltage bias and temperature. In all these quantities we observe characteristic non-equilibrium features for a nonvanishing external voltage bias like Kondo splitting and strongly enhanced logarithmic corrections.

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