Publication Type
Journal
Journal Name
Physical Review B
Publication Date
Page Number
153304
Volume
78
Issue
15
Abstract
We study the linear conductance through a double-quantum-dot system consisting of an interacting dot in its Kondo regime and an effectively noninteracting dot connected in parallel to metallic leads. Signatures in the zero-bias conductance at temperatures T0 mark a pair of quantum T=0 phase transitions between a Kondo-screened many-body ground state and non-Kondo ground states. Notably, the conductance features become more prominent with increasing T, which enhances the experimental prospects for accessing the quantum-critical region through tuning of gate voltages in a single device.