QUANTUM DOTS BASED ON PARABOLIC QUANTUM WELLS: IMPORTANCE OF ELECTRONIC CORRELATIONS
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IHN, THOMAS
Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland
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ELLENBERGER, CHRISTOPH
Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland
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ENSSLIN, KLAUS
Solid State Physics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland
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YANNOULEAS, CONSTANTINE
School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA
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LANDMAN, UZI
School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA
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DRISCOLL, DAN C.
Materials Department, University of California, Santa Barbara, CA 93106, USA
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GOSSARD, ART C.
Materials Department, University of California, Santa Barbara, CA 93106, USA
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Published in:
- International Journal of Modern Physics B. - World Scientific Pub Co Pte Lt. - 2007, vol. 21, no. 08n09, p. 1316-1325
English
We present measurements and theoretical interpretation of the magnetic field dependent excitation spectra of a two-electron quantum dot. The quantum dot is based on an Al x Ga 1-x As parabolic quantum well with effective g⋆-factor close to zero. Results of tunneling spectroscopy of the four lowest states are compared to exact diagonalization calculations and a generalized Heitler–London approximation and good agreement is found. Electronic correlations, associated with the formation of an H 2-type Wigner molecule, turn out to be very important in this system.
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Open access status
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green
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https://sonar.ch/global/documents/134745
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