Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Portrait of Heiner Linke; Photo: Kennet Ruona

Heiner Linke

Professor, Deputy dean at Faculty of Engineering, LTH

Portrait of Heiner Linke; Photo: Kennet Ruona

Nonlinear thermoelectric response due to energy-dependent transport properties of a quantum dot

Author

  • Artis Svilans
  • Adam M. Burke
  • Sofia Fahlvik Svensson
  • Martin Leijnse
  • Heiner Linke

Summary, in English

Quantum dots are useful model systems for studying quantum thermoelectric behavior because of their highly energy-dependent electron transport properties, which are tunable by electrostatic gating. As a result of this strong energy dependence, the thermoelectric response of quantum dots is expected to be nonlinear with respect to an applied thermal bias. However, until now this effect has been challenging to observe because, first, it is experimentally difficult to apply a sufficiently large thermal bias at the nanoscale and, second, it is difficult to distinguish thermal bias effects from purely temperature-dependent effects due to overall heating of a device. Here we take advantage of a novel thermal biasing technique and demonstrate a nonlinear thermoelectric response in a quantum dot which is defined in a heterostructured semiconductor nanowire. We also show that a theoretical model based on the Master equations fully explains the observed nonlinear thermoelectric response given the energy-dependent transport properties of the quantum dot.

Department/s

  • Solid State Physics
  • NanoLund

Publishing year

2016

Language

English

Pages

34-38

Publication/Series

Physica E: Low-Dimensional Systems and Nanostructures

Volume

82

Document type

Journal article

Publisher

Elsevier

Topic

  • Condensed Matter Physics

Keywords

  • Coulomb blockade
  • Nanowire
  • Nonlinear
  • Thermocurrent
  • Thermoelectrics
  • Top-heating

Status

Published

ISBN/ISSN/Other

  • ISSN: 1386-9477