Abstract
We investigate the Coulomb blockade in quantum dots asymmetrically coupled to the leads for an arbitrary voltage bias focusing on the regime where electrons do not thermalise during their dwell time in the dot. By solving the quantum kinetic equation, we show that the current-voltage characteristics are crucially dependent on the ratio of the Fermi energy to charging energy on the dot. In the standard regime when the Fermi energy is large, there is a Coulomb staircase which is practically the same as in the thermalised regime. In the opposite case of the large charging energy, we identify a new regime in which only one step is left in the staircase, and we anticipate experimental confirmation of this finding.
| Original language | English |
|---|---|
| Article number | 475302 |
| Number of pages | 7 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 35 |
| Issue number | 47 |
| Early online date | 29 Aug 2023 |
| DOIs | |
| Publication status | Published - 29 Aug 2023 |
Bibliographical note
Copyright © 2023, The Author(s). Published by IOP Publishing LtdOriginal Content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence [https://creativecommons.org/licenses/by/4.0/]. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.The authors gratefully acknowledge support from EPSRC under the Grant EP/R029075/1 (I V L) and from the Leverhulme Trust under the Grant RPG-2019-317 (I V Y).
Keywords
- quantum dots
- many-body localisation
- non-equilibrium systems
- Keldysh techniques
- Coulomb blockade