Phase Effects on the Conductance Through Parallel Double Dots
arXiv:cond-mat/0404685 · doi:10.1103/PhysRevB.72.125302
Abstract
Phase effects on the conductance of a double-dot system in a ring structure threaded by a magnetic flux are studied. The Aharonov-Bohm effect combined with the dot many-body charging effects determine the phases of the currents going through each arm of the ring. The cases for zero magnetic flux or half a quantum of flux are discussed in detail. It is shown that, depending upon the magnetic flux and the state of charge of the dots, controlled by gate potentials, the dephasing of the upper and lower arm current gives rise to a or S=1 Kondo regime. We also show that even in the absence of a magnetic flux there can be a circulating current in the ring, depending on the system parameters.
Submitted to PRL 10/2003
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Cited by in corpus (7)
- Quantum phase transitions in the systems of parallel quantum dots
- Waiting time distributions of electron transfers through quantum dot Aharonov-Bohm interferometers
- Kondo effect of an adsorbed cobalt phthalocyanine (CoPc) molecule: the role of quantum interference
- Kondo Regime of a Quantum Dot Molecule: A Finite-U Slave-Boson Approach
- Negative differential conductance induced by electronic correlation in a double quantum-dot molecule
- Evolution of the transmission phase through a Coulomb-blockaded Majorana wire
- Transmission phase lapses through a quantum dot in a strong magnetic field