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Phys. Rev. Lett. 70, 2601–2604 (1993)

Low-temperature transport through a quantum dot: The Anderson model out of equilibrium

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Yigal Meir
Department of Physics, University of California(enSanta Barbara, Santa Barbara, California 93106

Ned S. Wingreen
NEC Research Institute, 4 Independence Way, Princeton, New Jersey 08540

Patrick A. Lee
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Received 7 December 1992; published in the issue dated 26 April 1993

The infinite-U Anderson model is applied to nonequilibrium transport through a quantum dot containing two spin levels weakly coupled to two leads. At low temperatures, the Kondo peak in the equilibrium density of states is split upon the application of a voltage bias. The split peaks, one at the chemical potential of each lead, are suppressed by nonequilibrium dissipation. In a magnetic field, the Kondo peaks shift away from the chemical potentials by the Zeeman energy, leading to an observable peak in the differential conductance when the nonequilibrium bias equals the Zeeman energy.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.2601
DOI:
10.1103/PhysRevLett.70.2601
PACS:
72.15.Qm, 73.20.Dx, 73.40.Gk, 73.50.Fq