Thermal transistor and thermometer based on Coulomb-coupled conductors
Journal article, 2019

We study a three-terminal setup consisting of a single-level quantum dot capacitively coupled to a quantum point contact. The point contact connects to a source and drain reservoir while the quantum dot is coupled to a single base reservoir. This setup has been used to implement a noninvasive, nanoscale thermometer for the bath reservoir by detecting the current in the quantum point contact. Here, we demonstrate that the device can also be operated as a thermal transistor where the average (charge and heat) current through the quantum point contact is controlled via the temperature of the base reservoir. We characterize the performances of this device both as a transistor and a thermometer and derive the operating condition maximizing their respective sensitivities. The present analysis is useful for the control of charge and heat flow and high precision thermometry at the nanoscale.


Jing Yang

University of Rochester

Cyril Elouard

University of Rochester

Janine Splettstoesser

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Björn Sothmann

University of Duisburg-Essen

Rafael Sánchez

Universidad Autonoma de Madrid (UAM)

Andrew N. Jordan

University of Rochester

Chapman University

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 100 4 045418

Areas of Advance

Nanoscience and Nanotechnology (SO 2010-2017, EI 2018-)

Subject Categories

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics



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