A New Quantum Phase Transition in the Coupled Quantum Dots System
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
We study two quantum dots in the limit of strong dot-lead coupling and weak dot-dot tunneling. The model maps on Ising-coupled Kondo impurities. We argue that a new quantum critical fixed point exists at an intermediate value of the mutual capacitance, supporting non-Fermi liquid behaviour. We construct the total conductance across the double dot structure. It exhibits a strongly peaked behaviour as a function of the mutual capacitance, gate voltage, and temperature.
Cite
@article{arxiv.cond-mat/9711098,
title = {A New Quantum Phase Transition in the Coupled Quantum Dots System},
author = {Natan Andrei and Gergely T. Zimanyi and Gerd Schoen},
journal= {arXiv preprint arXiv:cond-mat/9711098},
year = {2007}
}
Comments
4 pages, Latex