Asymmetric power dissipation in electronic transport through a quantum point contact
Carmen Blaas-Anselmi, Félix Helluin, Rodolfo A. Jalabert, Guillaume Weick, Dietmar Weinmann
SciPost Phys. 12, 105 (2022) · published 25 March 2022
- doi: 10.21468/SciPostPhys.12.3.105
We investigate the power dissipated by an electronic current flowing through a quantum point contact in a two-dimensional electron gas. Based on the Landauer-B\"uttiker approach to quantum transport, we evaluate the power that is dissipated on the two sides of the constriction as a function of the Fermi energy, temperature, and applied voltage. We demonstrate that an asymmetry appears in the dissipation, which is most pronounced when the quantum point contact is tuned to a conductance step where the transmission strongly depends on energy. At low temperatures, the asymmetry is enhanced when the temperature increases. An estimation for the position of the maximum dissipation is provided.
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 2 3 Carmen Blaas-Anselmi,
- 1 2 3 Félix Helluin,
- 1 2 3 Rodolfo Jalabert,
- 1 2 3 Guillaume Weick,
- 1 2 3 Dietmar Weinmann
- 1 Centre National de la Recherche Scientifique / French National Centre for Scientific Research [CNRS]
- 2 Université de Strasbourg / University of Strasbourg
- 3 Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]