Coulomb blockade and Quantum Critical Points in Quantum Dots
Mesoscale and Nanoscale Physics
2007-05-23 v1 Strongly Correlated Electrons
Abstract
An ultrasmall quantum dot coupled to a lead and to a quantum box (a large quantum dot) is investigated. Tuning the tunneling amplitudes to the lead and box, we find a line of unstable non-Fermi-liquid fixed points as function of the gate potentials of the quantum dots, extending to arbitrary charging energies on the small and large quantum dots. These quantum-critical fixed points possess a finite residual entropy. They govern the cross over from one Fermi-liquid regime to another, characterized by distinct (high and low) conductance values.
Cite
@article{arxiv.cond-mat/0406316,
title = {Coulomb blockade and Quantum Critical Points in Quantum Dots},
author = {Frithjof B. Anders and Eran Lebanon and Avraham Schiller},
journal= {arXiv preprint arXiv:cond-mat/0406316},
year = {2007}
}
Comments
2 pages, 3 figures, Elsevier Science style