Your browser doesn't support javascript.
loading
Quantum Confinement Suppressing Electronic Heat Flow below the Wiedemann-Franz Law.
Majidi, Danial; Josefsson, Martin; Kumar, Mukesh; Leijnse, Martin; Samuelson, Lars; Courtois, Hervé; Winkelmann, Clemens B; Maisi, Ville F.
Afiliação
  • Majidi D; Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 25 rue des Martyrs, 38042 Grenoble, France.
  • Josefsson M; NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden.
  • Kumar M; NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden.
  • Leijnse M; NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden.
  • Samuelson L; NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden.
  • Courtois H; Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 25 rue des Martyrs, 38042 Grenoble, France.
  • Winkelmann CB; Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 25 rue des Martyrs, 38042 Grenoble, France.
  • Maisi VF; NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden.
Nano Lett ; 22(2): 630-635, 2022 Jan 26.
Article em En | MEDLINE | ID: mdl-35030004
ABSTRACT
The Wiedemann-Franz law states that the charge conductance and the electronic contribution to the heat conductance are proportional. This sets stringent constraints on efficiency bounds for thermoelectric applications, which seek a large charge conduction in response to a small heat flow. We present experiments based on a quantum dot formed inside a semiconducting InAs nanowire transistor, in which the heat conduction can be tuned significantly below the Wiedemann-Franz prediction. Comparison with scattering theory shows that this is caused by quantum confinement and the resulting energy-selective transport properties of the quantum dot. Our results open up perspectives for tailoring independently the heat and electrical conduction properties in semiconductor nanostructures.
Palavras-chave

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article