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Signatures of Wigner localization in epitaxially grown nanowires

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Author

Summary, in English

It was predicted by Wigner in 1934 that an electron gas will undergo a transition to a crystallized state when its density is very low. Whereas significant progress has been made toward the detection of electronic Wigner states, their clear and direct experimental verification still remains a challenge. Here we address signatures of Wigner molecule formation in the transport properties of InSb nanowire quantum-dot systems, where a few electrons may form localized states depending on the size of the dot (i.e., the electron density). Using a configuration interaction approach combined with an appropriate transport formalism, we are able to predict the transport properties of these systems, in excellent agreement with experimental data. We identify specific signatures of Wigner state formation, such as the strong suppression of the antiferromagnetic coupling, and are able to detect the onset of Wigner localization, both experimentally and theoretically, by studying different dot sizes.

Publishing year

2011

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

83

Issue

4

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics

Status

Published

Research group

  • Nanometer structure consortium (nmC)
  • Linne Center for Nanoscience and Quantum Engineering

ISBN/ISSN/Other

  • ISSN: 1098-0121