Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach

Details Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach

2006-07-28

arxiv.org/abs/cond-mat/0607773v1

Phys. Rev. B 74, 155125 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

31 pages, 6 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.74.155125

We study the differential conductance, spectral density and magnetization, for a quantum dot coupled to two conducting leads as a function of bias voltage, magnetic field and temperature. The system is modeled with the Anderson model solved using a spin dependent interpolative perturbative approximation in the Coulomb repulsion U that conserves the current. For large enough magnetic field, the differential conductance as a function of bias voltage shows split peaks. This splitting is larger than the corresponding splitting in the spectral density of states, in agreement with experiment.

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