Abstract
The management of dissipation and heat flows in quantum nanoelectronic devices is becoming of growing importance, in particular in view of preservingcoherence in quantum information processing applications. Single-quantum-dot junctions, which involve electron transport through a single quantum level, are a key element for quantum electronics. We study the thermoelectric and thermal transport properties of such devices. We demonstrate that the gate potential canbe used to modulate the heat carried by electrons across a single quantum level [1], which remains however significantly below the naive expectation from the Wiedemann-Franz prediction [2]. Although a general theory for heat transport through a quantum dot junction, accounting for on-site interactions, is still lacking, the heat transport data are well captured at the conductance resonances by non-interacting scattering theory. Eventually, going beyond quasi-equilibrium conditions, the potential of time-resolved thermometry for the calorimetric detection of out-of-equilibrium processes and fluctuations in quantum devices will be discussed.
[1] B. Dutta et al., Phys. Rev. Lett. 125, 237701 (2020).
[2] D. Majidi et al., Nano Lett. 22, 630 (2022).
Bio: C. Winkelmann obtained his PhD in 2004 from the University of Grenoble. He is now an Associate Professor of Physics at the Grenoble Institute of Technology. His research focuses on the electronic properties of quantum materials and devices, in particular related to mesoscopic superconductivity, low dimensionality and thermal properties in the quantum regime.
Event Details
Date/Time:
-
Date:Monday, March 21, 2022 - 2:00pm to 3:00pm
Location:
Howey N110 Conference Room
For More Information Contact
Claire Berger
