Mesoscopic Fluctuations of Co-Tunneling and Kondo Effect in Quantum Dots

Abstract

Conductance of a quantum dot in the Coulomb blockade regime is discussed. At moderately low temperatures, the thermally-assisted transport of electrons through the dot gives way to elastic co-tunneling [1]. The amplitude of the elastic co-tunneling is sensitive to the specific structure of electron wave functions in a given sample. The conductance exhibits strong mesoscopic fluctuations [2]. Statistical properties of these fluctuations are reviewed in this lecture. At lower temperatures, conductance through a dot is altered by the Kondo effect, if the number of electrons on the dot is odd. We describe the universal features of the Kondo conductance [3 4], and briefly discuss the manifestations of this effect in the limiting cases of weak and strong [5] dot-lead coupling.KeywordsGate VoltageLevel SpacingVirtual StateCoulomb BlockadeKondo EffectThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.