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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

Lineshape of the thermopower of quantum dots

Author

  • Sofia Fahlvik Svensson
  • Ann Persson
  • E. A. Hoffmann
  • N. Nakpathomkun
  • Henrik Nilsson
  • Hongqi Xu
  • Lars Samuelson
  • Heiner Linke

Summary, in English

Quantum dots are an important model system for thermoelectric phenomena, and may be used to enhance the thermal-to-electric energy conversion efficiency in functional materials, by tuning the Fermi energy relative to the dots' transmission resonances. It is therefore important to obtain a detailed understanding of a quantum dot's thermopower as a function of the Fermi energy. However, so far it has proven difficult to take the effects of interactions into account in the interpretation of experimental data. In this paper, we present detailed measurements of the thermopower of quantum dots defined in heterostructure nanowires. We show that the thermopower lineshape is described well by a Landauer-type transport model that uses as its input experimental values of the dot conductance, which contains information about interaction effects.

Department/s

  • Solid State Physics
  • NanoLund

Publishing year

2012

Language

English

Publication/Series

New Journal of Physics

Volume

14

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1367-2630