Heat Driven Transport in Serial Double Quantum Dot Devices

Sven Dorsch, Artis Svilans, Martin Josefsson, Bahareh Goldozian, Mukesh Kumar, Claes Thelander, Andreas Wacker, Adam Burke

Research output: Contribution to journalArticlepeer-review


Studies of thermally induced transport in nanostructures provide access to an exciting regime where fluctuations are relevant, enabling the investigation of fundamental thermodynamic concepts and the realization of thermal energy harvesters. We study a serial double quantum dot formed in an InAs/InP nanowire coupled to two electron reservoirs. By means of a specially designed local metallic joule-heater, the temperature of the phonon bath in the vicinity of the double quantum dot can be enhanced. This results in phonon-assisted transport, enabling the conversion of local heat into electrical power in a nanosized heat engine. Simultaneously, the electron temperatures of the reservoirs are affected, resulting in conventional thermoelectric transport. By detailed modeling and experimentally tuning the interdot coupling, we disentangle both effects. Furthermore, we show that phonon-assisted transport is sensitive to excited states. Our findings demonstrate the versatility of our design to study fluctuations and fundamental nanothermodynamics.

Original languageEnglish
Pages (from-to)988–994
JournalNano Letters
Issue number2
Publication statusPublished - 2021

Subject classification (UKÄ)

  • Condensed Matter Physics


  • nanowire
  • phonon assisted transport
  • quantum dot
  • thermal energy harvesters
  • thermoelectric effect


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