Low Temperature Physics: 43, 95 (2017); https://doi.org/10.1063/1.4974188
Физика Низких Температур: Том 43, Выпуск 1 (Январь 2017), c. 115-121    ( к оглавлению , назад )

Two-instanton approximation to the Coulomb blockade problem

I.S. Burmistrov

L.D. Landau Institute for Theoretical Physics, 2 Kosygina Str., Moscow117940, Russia

Laboratory for Condensed Matter Physics, National Research University Higher School of Economics Moscow 101000, Russia
E-mail: burmi@itp.ac.ru

Received July 13, 2016


We develop the two-instanton approximation to the current-voltage characteristic of a single electron transistor within the Ambegaokar–Eckern–Schön model. We determine the temperature and gate voltage dependence of the Coulomb blockade oscillations of the conductance and the effective charge. We find that a small (in comparison with the charging energy) bias voltage leads to significant suppression of the Coulomb blockade oscillations and to appearance of the bias-dependent phase shift.

PACS: 73.23.Hk Coulomb blockade; single-electron tunneling;
PACS: 73.43.–f Quantum Hall effects;
PACS: 73.43.Nq Quantum phase transitions.

Ключевые слова: Ambegaokar–Eckern–Schön model, current-voltage characteristic, Coulomb blockade oscillations.

Published online: November 25, 2016