Two-stage Kondo effect in a quantum dot at high magnetic field

Preprint

20 October 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0110432

Abstract

We report a strong Kondo effect (Kondo temperature ~ 4K) at high magnetic field in a selective area growth semiconductor quantum dot. The Kondo effect is ascribed to a singlet-triplet transition in the ground state of the dot. At the transition, the low-temperature conductance approaches the unitary limit. Away from the transition, for low bias voltages and temperatures, the conductance is sharply reduced. The observed behavior is compared to predictions for a two-stage Kondo effect in quantum dots coupled to single-channel leads.

Keywords

HIGH MAGNETIC FIELD
STAGE KONDO EFFECT
TWO STAGE KONDO
MAGNETIC FIELD
QUANTUM DOT

All Related Versions

Version 1, 2001-10-20, ArXiv
Published version: Physical Review Letters, 88 (12), 126803.

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