Tunnelling density of states at Coulomb blockade peaks

Details Tunnelling density of states at Coulomb blockade peaks Tunnelling density of states at Coulomb blockade peaks

2006-07-25

arxiv.org/abs/cond-mat/0607649v1

Europhys.Lett. 76, 109 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures

Scientific paper

10.1209/epl/i2006-10236-0

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.

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