Coulomb effects in tunneling through a quantum dot stack
- 19 March 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 69 (12) , 125328
- https://doi.org/10.1103/physrevb.69.125328
Abstract
Tunneling through two vertically coupled quantum dots is studied by means of a Pauli master equation model. The observation of double peaks in the current-voltage characteristic in a recent experiment is analyzed in terms of the tunnel coupling between the quantum dots and the coupling to the contacts. Different regimes for the emitter chemical potential indicating different peak scenarios in the tunneling current are discussed in detail. We show by comparison with a density matrix approach that the interplay of coherent and incoherent effects in the stationary current can be fully described by this approach.Keywords
All Related Versions
This publication has 19 references indexed in Scilit:
- Shot noise of coupled semiconductor quantum dotsPhysical Review B, 2003
- Transport through an isolated artificial molecule formed from stacked self-assembled quantum dotsApplied Physics Letters, 2003
- Electron transport through double quantum dotsReviews of Modern Physics, 2002
- Designed emitter states in resonant tunneling through quantum dotsApplied Physics Letters, 2002
- Nonlinear transport through an ensemble of quantum dotsPhysica B: Condensed Matter, 2001
- Sequential tunneling through an array of electrostatically coupled quantum dotsPhysica E: Low-dimensional Systems and Nanostructures, 2001
- High peak-to-valley ratios observed in InAs/InP resonant tunneling quantum dot stacksApplied Physics Letters, 2001
- Resonant Tunneling Through Two Discrete Energy StatesPhysical Review Letters, 1995
- Conductance spectroscopy in coupled quantum dotsPhysical Review B, 1994
- Theory of Coulomb-blockade oscillations in the conductance of a quantum dotPhysical Review B, 1991