The direct measurement of charge and its distribution was reported in a Kondo correlated quantum dot (QD). It was revealed by a noninvasive potential-sensitive detector that, although the conductance of the QD was significantly enhanced as it entered in the Kondo regime, the average charge remained unaffected. The separation between spin and charge degrees of freedom was also demonstrated. An abrupt redistribution of charge in the QD, taking place with an onset of Kondo correlation was found under certain conditions. A correlation between the spin and charge degrees of freedom was suggested.
|Number of pages||4|
|Journal||Physical Review Letters|
|State||Published - 29 Apr 2002|