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Portrait of Heiner Linke; Photo: Kennet Ruona

Heiner Linke

Professor, Deputy dean at Faculty of Engineering, LTH

Portrait of Heiner Linke; Photo: Kennet Ruona

Thermopower as a tool to investigate many-body effects in quantum systems

Author

  • Liney Halla Kristinsdottir
  • Jakob Bengtsson
  • Heiner Linke
  • Stephanie Reimann
  • Andreas Wacker

Summary, in English

Measuring the thermopower of a confined quantum system reveals important information about its excitation spectrum. Our simulations show how this kind of transport spectroscopy is able to extract a clear signal for the onset of Wigner localization in a nanowire segment. This demonstrates that thermopower measurements provide a tool for investigating complex many-body quantum effects, which is less intrusive than the usual charge-stability diagram as no high source-drain bias is required. While the effect is most pronounced for weak tunnel coupling and low temperatures, the excited states also significantly affect the thermopower spectrum at moderate temperature, adding distinct features to the characteristic thermopower lineshape. (C) 2014 AIP Publishing LLC.

Department/s

  • NanoLund
  • Mathematical Physics
  • Solid State Physics

Publishing year

2014

Language

English

Publication/Series

Applied Physics Letters

Volume

105

Issue

8

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Condensed Matter Physics

Status

Published

Research group

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

ISBN/ISSN/Other

  • ISSN: 0003-6951