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Sigrist, Martin ; Gustavsson, S. ; Ihn, Thomas ; Ensslin, Klaus ; Driscoll, D. ; Gossard, A. C. ; Reinwald, Matthias ; Wegscheider, Werner

Few-electron quantum dot fabricated with layered scanning force microscope lithography

Sigrist, Martin, Gustavsson, S., Ihn, Thomas, Ensslin, Klaus, Driscoll, D., Gossard, A. C., Reinwald, Matthias and Wegscheider, Werner (2006) Few-electron quantum dot fabricated with layered scanning force microscope lithography. Physica E Low-dimensional Systems and Nanostructures 32 (1-2), pp. 5-8.

Date of publication of this fulltext: 25 Jan 2010 13:12
Article
DOI to cite this document: 10.5283/epub.12185


Abstract

Few-electron quantum dots with integrated charge read-out have been fabricated by layered local anodic oxidation of a Ga[Al]As heterostructure and a thin Titanium top gate. The additional set of gates provided by the metallic film is used to tune the quantum dots into the few-electron regime. Current through the quantum dots and the quantum dot charge have been simultaneously measured for ...

Few-electron quantum dots with integrated charge read-out have been fabricated by layered local anodic oxidation of a Ga[Al]As heterostructure and a thin Titanium top gate. The additional set of gates provided by the metallic film is used to tune the quantum dots into the few-electron regime. Current through the quantum dots and the quantum dot charge have been simultaneously measured for electron numbers varying between zero and two. The singlet–triplet splitting varies in two different samples between 0.5 and 1.5 meV. The Zeeman splitting of the first conductance resonance is observed in parallel magnetic field. The high tunability and straightforward implementation of these structures are promising for future nanostructure design.



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Details

Item typeArticle
Journal or Publication TitlePhysica E Low-dimensional Systems and Nanostructures
Publisher:Elsevier
Volume:32
Number of Issue or Book Chapter:1-2
Page Range:pp. 5-8
DateMay 2006
InstitutionsPhysics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider
Identification Number
ValueType
10.1016/j.physe.2005.12.128DOI
Classification
NotationType
73.23.Hk; 73.63.Kv; 73.21.LaPACS
KeywordsFew-electron quantum dot; Layered lithography; Scanning force microscope
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedUnknown
Created at the University of RegensburgUnknown
Item ID12185

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