Tunnelling density of states at Coulomb blockade peaks

Abstract

We calculate the tunnelling density of states (TDoS) for a quantum dot in the Coulomb blockade regime, using a functional integral representation with allowing correctly for the charge quantisation. We show that in addition to the well-known gap in the TDoS in the Coulomb-blockade valleys, there is a suppression of the TDoS at the peaks. We show that such a suppression is necessary in order to get the correct result for the peak of the differential conductance through an almost close quantum dot.

arXiv comment6 pages, 2 figures

References in corpus (9)

• Time-dependent transport in interacting and non-interacting mesoscopic systems
• The Statistical Theory of Quantum Dots
• Quantum Effects in Coulomb Blockade
• Electron--electron Interactions in Disordered Metals: Keldysh Formalism
• Coulomb effects in granular materials at not very low temperatures
• Coulomb Zero-Bias Anomaly: A Semiclassical Calculation
• Transition from insulating to a non-insulating temperature dependence of the conductivity in granular metals
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