Phonon-assisted Kondo Effect in a Single-Molecule Transistor out of Equilibrium

Details Phonon-assisted Kondo Effect in a Single-Molecule Transistor out of Equilibrium Phonon-assisted Kondo Effect in a Single-Molecule Transistor out of Equilibrium

2005-04-20

arxiv.org/abs/cond-mat/0504506v2

J. Phys.: Condens. Matter 18 (2006) 5435-5446

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 6 figures

Scientific paper

10.1088/0953-8984/18/23/015

The joint effect of the electron-phonon interaction and Kondo effect on the nonequilibrium transport through the single molecule transistor is investigated by using the improved canonical transformation scheme and extended equation of motion approach. Two types of Kondo phonon-satellites with different asymmetric shapes are fully confirmed in the spectral function, and are related to the electron spin singlet or hole spin singlet, respectively. Moreover, when a moderate Zeeman splitting is caused by a local magnetic field, the Kondo satellites in the spin resolved spectral function are found disappeared on one side of the main peak, which is opposite for different spin component. All these peculiar signatures that manifest themselves in the nonlinear differential conductance, are explained with a clear physics picture.

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