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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

Experimental verification of reciprocity relations in quantum thermoelectric transport

Author

  • J. Matthews
  • Francesca Battista
  • D. Sanchez
  • Peter Samuelsson
  • Heiner Linke

Summary, in English

Fundamental symmetries in thermoelectric quantum transport, beyond Onsagers relations, were predicted two decades ago but have to date not been observed in experiments. Recent works have predicted the symmetries to be sensitive to energy-dependent, inelastic scattering, raising the question whether they exist in practice. Here, we answer this question affirmatively by experimentally verifying the thermoelectric reciprocity relations in a four-terminal mesoscopic device where each terminal can be electrically and thermally biased individually. The linear-response thermoelectric coefficients are found to be symmetric under simultaneous reversal of magnetic field and exchange of injection and emission contacts. We also demonstrate a controllable breakdown of the reciprocity relations by increasing thermal bias, putting in prospect enhanced thermoelectric performance.

Department/s

  • Mathematical Physics
  • NanoLund

Publishing year

2014

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

90

Issue

16

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics
  • Nano Technology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1098-0121