Coulomb staircase in an asymmetrically coupled quantum dot
arXiv:2304.09665 · doi:10.1088/1361-648X/acede0
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.
arXiv comment12 pages, 2 figures; final version, as published (typos corrected, introduction and section 4 contain revised arguments, results are unchanged)
References in corpus (18)
- Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states
- Time-dependent transport in interacting and non-interacting mesoscopic systems
- The Statistical Theory of Quantum Dots
- Quasiparticle Lifetime in a Finite System: A Non--Perturbative Approach
- Quantum Effects in Coulomb Blockade
- Full Counting Statistics of Charge Transfer in Coulomb Blockade Systems
- Counting Statistics of Non-Markovian Quantum Stochastic Processes
- Zero Frequency Current Noise for the Double Tunnel Junction Coulomb Blockade
- Chaos, interactions, and nonequilibrium effects in the tunneling resonance spectra of small metallic particles
- Inelastic Electron Lifetime in Disordered Mesoscopic Systems
- Spontaneous Relaxation of a Charge Qubit under Electrical Measurement
- Finite-frequency counting statistics of electron transport: Markovian Theory
- Quantum interference and Coulomb interaction in arrays of tunnel junctions
- Zero--Bias Anomaly in Finite Size Systems
- QmeQ 1.0: An open-source Python package for calculations of transport through quantum dot devices
- Tunnelling density of states at Coulomb blockade peaks
- Relaxation dynamics of the electron distribution in the Coulomb blockade problem
- Memory effect preserved time-local approach to noise spectrum of transport current