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Signatures of Wigner localization in epitaxially grown nanowires

In English

Författare

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.

Publiceringsår

2011

Språk

Engelska

Publikation/Tidskrift/Serie

Physical Review B (Condensed Matter and Materials Physics)

Volym

83

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

American Physical Society

Ämne

  • Condensed Matter Physics

Status

Published

Forskningsgrupp

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

ISBN/ISSN/Övrigt

  • ISSN: 1098-0121