This week's seminar

[CM ICTP - Trieste]

CONDENSED MATTER SECTION

	
SEMINAR on   Disorder and strong electron correlations




Thursday, 1 February   -    11:00 a.m.



Lecture Room 'C',  Main Bldg.- terrace level




M. KISELEV   ( The Abdus Salam I.C.T.P. )




"Kondo shuttling in nanoelectromechanical devices"


Abstract

	We investigate theoretically a mechanically assisted Kondo effect and 
electric charge shuttling in nanoelectromechanical single-electron 
transistor (NEM-SET)  charged by odd/even number of electrons.  It is 
shown that the mechanical motion of mobile quantum impurity with the 
spin results in the time dependent tunneling width which leads to 
effective increase of the Kondo temperature.  The time-dependent 
oscillating Kondo temperature changes the scaling behavior of the 
differential conductance resulting in the suppression of transport in a 
strong coupling- and its enhancement in a weak coupling regimes. The 
conditions for fine-tuning of the Abrikosov-Suhl resonance and possible 
experimental realization of the Kondo shuttling in a spin pumping 
regime are discussed.