TODAY - CME Seminar - Andrei Kogan, University of Cincinnati - 11:30am, Smith Seminar Room (1080 PRB)

[Robbins, Eric]

Please join us TODAY for the Condensed Matter Experiment Seminar presented by Andrei Kogan, University of Cincinnati at 11:30am in the Smith Seminar Room (1080 PRB).  The title and abstract for the talk are below.

"Non-adiabatic transport in Single-Electron transistors in the Kondo regime"

Magnetic impurities in conductors alter the Fermi sea: A many-body state (A Kondo singlet) is formed that entangles itinerant carriers and the impurity site.  This causes a sharp rearrangement of the density of states near the Fermi surface into a hierarchical set governed by a single energy parameter Tk, the Kondo temperature.  Equilibrium physics of such electronic "knots" scales with Tk and is highly universal: impurities that differ microscopically from one another yet have similar Kondo temperatures produce Kondo states with similar properties.  Recent studies of Kondo physics with voltage-controllable spin traps known as Single-Electron Transistors (SETs) have focused on nonequilibrium Kondo phenomena, sensitive to the interplay between coherent correlations and dissipative effects, aiming to understand the extent of Kondo universality away from equilibrium.
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