Issue |
Europhys. Lett.
Volume 71, Number 4, August 2005
|
|
---|---|---|
Page(s) | 672 - 678 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2005-10126-y | |
Published online | 20 July 2005 |
vs.
Kondo
effect in double quantum dot
1. Institut für Theoretische Physik, Universität Hamburg Jungiusstr. 9, 20355 Hamburg, Germany
Received:
2
May
2005
Accepted:
22
June
2005
We consider the spin and orbital Kondo effect in a parallel
arrangement of two strongly electrostatically coupled quantum
dots. Increasing the exchange of electrons between the dots
through the attached leads induces a transition between the
spin and orbital Kondo effect and
spin Kondo
effect. Being the same for the
and
symmetry
points, the Kondo temperature drops slightly in the intermediate
regime. Experimentally, two kinds of Kondo effects can be
discriminated by the sensitivity to the suppression of the spin
Kondo effect by Zeeman field. The dependence of the Kondo
temperature on Zeeman field and the strength of electronic
exchange mediated by the leads is analyzed in detail.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.63.Kv – Quantum dots / 72.15.Qm – Scattering mechanisms and Kondo effect
© EDP Sciences, 2005
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