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Fuhrer, A. ; Ihn, Thomas ; Ensslin, Klaus ; Wegscheider, Werner ; Bichler, Max

Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring

Fuhrer, A., Ihn, Thomas , Ensslin, Klaus, Wegscheider, Werner and Bichler, Max (2003) Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring. Physical Review Letters 91 (20), p. 206802.

Date of publication of this fulltext: 15 Dec 2009 08:55
Article
DOI to cite this document: 10.5283/epub.11485


Abstract

Wave-function and interaction effects in the addition spectrum of a Coulomb-blockaded many-electron quantum ring are investigated as a function of asymmetrically applied gate voltages and magnetic field. Hartree and exchange contributions to the interaction are quantitatively evaluated at a crossing between states extended around the ring and states which are more localized in one arm of the ...

Wave-function and interaction effects in the addition spectrum of a Coulomb-blockaded many-electron quantum ring are investigated as a function of asymmetrically applied gate voltages and magnetic field. Hartree and exchange contributions to the interaction are quantitatively evaluated at a crossing between states extended around the ring and states which are more localized in one arm of the ring. A gate tunable singlet-triplet transition of the two uppermost levels of this many-electron ring is identified at zero magnetic field.



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Details

Item typeArticle
Journal or Publication TitlePhysical Review Letters
Publisher:AMER PHYSICAL SOC
Place of Publication:COLLEGE PK
Volume:91
Number of Issue or Book Chapter:20
Page Range:p. 206802
Date14 November 2003
InstitutionsPhysics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider
Identification Number
ValueType
10.1103/PhysRevLett.91.206802DOI
Related URLs
URLURL Type
http://link.aps.org/doi/10.1103/PhysRevLett.91.2068020Publisher
Classification
NotationType
73.23.–b, 03.67.LxPACS
KeywordsDOTS; SPECTRUM; COULOMB;
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedUnknown
Created at the University of RegensburgUnknown
Item ID11485

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