We consider how the absence of thermalization affects the classical Coulomb blockade regime in quantum dots. By solving the quantum kinetic equation in the experimentally accessible regime when the dot has two relevant occupation states, we calculate the current–voltage characteristics for arbitrary coupling to the leads. If the couplings are strongly asymmetric, the Coulomb staircase is practically reduced to the first step, which is independent of the charging energy, when the Fermi energy is comparatively small, while the standard thermalized results are recovered in the opposite case. When the couplings are of the same order, the absence of thermalization has a new, striking signature—a robust additional peak in the differential conductance.
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December 2024
Research Article|
December 01 2024
New regime of the Coulomb blockade in quantum dots Available to Purchase
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In memory of Sergey A. Gredeskul (1942–2023)
G. McArdle
;
G. McArdle
1
School of Physics and Astronomy, University of Birmingham
, Birmingham, B15 2TT, UK
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R. Davies
;
R. Davies
1
School of Physics and Astronomy, University of Birmingham
, Birmingham, B15 2TT, UK
2
School of Computer Science and Digital Technologies, Aston University
, Birmingham, B4 7ET, UK
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I. V. Lerner
;
I. V. Lerner
a)
1
School of Physics and Astronomy, University of Birmingham
, Birmingham, B15 2TT, UK
a)Author to whom correspondence should be addressed: [email protected]
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I. V. Yurkevich
I. V. Yurkevich
2
School of Computer Science and Digital Technologies, Aston University
, Birmingham, B4 7ET, UK
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G. McArdle
1
R. Davies
1,2
I. V. Lerner
1,a)
I. V. Yurkevich
2
1
School of Physics and Astronomy, University of Birmingham
, Birmingham, B15 2TT, UK
2
School of Computer Science and Digital Technologies, Aston University
, Birmingham, B4 7ET, UK
a)Author to whom correspondence should be addressed: [email protected]
Fiz. Nizk. Temp. 50, 1207–1214 (December 2024)
Low Temp. Phys. 50, 1083–1089 (2024)
Article history
Received:
October 21 2024
Citation
G. McArdle, R. Davies, I. V. Lerner, I. V. Yurkevich; New regime of the Coulomb blockade in quantum dots. Low Temp. Phys. 1 December 2024; 50 (12): 1083–1089. https://doi.org/10.1063/10.0034340
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