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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Tuesday, 15 January 2008
(at 16:00 in room 115, Hallwachsstr. 3)
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Understanding Kondo peak splitting via a nonperturbative dynamical theory

Jongbae Hong


Seoul National University
  Korea  






The peculiar behavior of Kondo-peak splitting under a magnetic field and bias can be explained by calculating the nonequilibrium retarded Green's function via the nonperturbative dynamical theory (NDT). In the NDT, the application of a lead-dot-lead system reveals that new resonant tunneling levels are activated near the Fermi level and the conventional Kondo peak at the Fermi level diminishes when a bias is applied. Magnetic field causes asymmetry in the spectral density and transforms the new resonant peak into a major peak whose behavior explains all the features of the nonequilibrium Kondo phenomenon. We also show the mechanism of coherent transport through the new resonant tunneling level.



slides (pdf)

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Invited by G. Cuniberti (nanoSeminar)

last modified: 2018.10.24 Mi
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