SKM 2023 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 60: Quantum Dots, Quantum Wires, Point Contacts
TT 60.4: Talk
Thursday, March 30, 2023, 18:00–18:15, HSZ 03
Resonant tunneling energy harvesters: Improving performance via quantum interference. — •José Balduque1 and Rafael Sánchez1,2 — 1Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain. — 2Condensed Matter Physics Center (IFIMAC), and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid, Spain.
The spectral filtering of quantum dots can be used for heat to power conversion in electronic conductors. A proposal based on resonant-tunneling three-terminal devices [1] has been recently verified experimentally [2]. Two quantum dots connect the two terminals of a conductor to a hot electronic cavity where carriers exchange heat via thermalization. We propose the heat source to be separated from the conductor via a beam-splitter (e.g., the tip of a scanning microscope) that mediates the system-bath coupling. The resulting ballistic electron propagation gives rise to interferences [3] able to improve the engine performance, both in the extracted power and efficiency [4].
[1] A.N. Jordan et al., Phys. Rev. B 87, 075312 (2013)
[2] G. Jaliel et al., Phys. Rev. Lett. 123, 117701 (2019)
[3] R. Sánchez et al., Phys. Rev. B 104, 115430 (2021)
[4] J. Balduque and R. Sánchez, in preparation.