Quantum phase transition in coupled quantum dots

Authors
Andrei, N Zimanyi, GT Schon, G
Citation
N. Andrei et al., Quantum phase transition in coupled quantum dots, PHYS REV B, 60(8), 1999, pp. R5125-R5128
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
8
Year of publication
1999
Pages
R5125 - R5128
Database
ISI
SICI code
0163-1829(19990815)60:8<R5125:QPTICQ>2.0.ZU;2-7
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 ar gue that a new quantum critical fixed point exists at an intermediate value of the mutual capacitance, supporting non-Fermi-liquid behavior. We constr uct the total conductance across the double dot structure. It exhibits a st rongly peaked behavior as a function of the mutual capacitance, gate voltag e, and temperature. [S0163-1829(99)50632-2].