J. Hong; "Steady State Kondo Phenomena in Mesoscopic Systems", Jan.20
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  • J. Hong; "Steady State Kondo Phenomena in Mesoscopic Systems", Jan.20

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 Faculty of Engineering and Natural Sciences







Steady State Kondo Phenomena in Mesoscopic Systems




Prof. Dr. Jongbae Hong


Department of Physics and Astronomy, Seoul National University, Seoul, Korea &


Max Planck Institute for Physics of Complex Systems, Dresden, Germany





The 0.7 conductance anomaly in a quantum point contact, various differential conductance line shapes in STM-Kondo systems, and the peak splitting under a magnetic field in a single- electron transistor with a quantum dot are long-standing problems in the area of mesoscopic physics.  These Kondo-related transport phenomena are classified as the steady state Kondo phenomena.  They have not been explained due to lack of relevant theory for the Kondo problem in a steady state.  In this talk, I briefly review experimental results and discuss the key issue in the steady-state Kondo phenomena.  Then, I will explain the basic ideas of my theoretical scheme that gives us a different point of view for Kondo physics.  I show that the new physics in electron transport in a mesoscopic system under a steady state is the transport through the resonant tunneling levels (RTLs), which occur only when a bias is applied.  That is the reason why the theory based on equilibrium state cannot explain these steady state phenomena.  I explain all the features of the abovementioned experiments in terms of the RTLs.



January 20,  2010, 13:40, FENS G035