Transmission of heat modes across a potential barrier

Amir Rosenblatt, Fabien Lafont (), Ivan Levkivskyi, Ron Sabo, Itamar Gurman, Daniel Banitt, Moty Heiblum and Vladimir Umansky
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Amir Rosenblatt: Weizmann Institute of Science
Fabien Lafont: Weizmann Institute of Science
Ivan Levkivskyi: Institute of Ecology and Evolution, University of Bern
Ron Sabo: Weizmann Institute of Science
Itamar Gurman: Weizmann Institute of Science
Daniel Banitt: Weizmann Institute of Science
Moty Heiblum: Weizmann Institute of Science
Vladimir Umansky: Weizmann Institute of Science

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Controlling the transmission of electrical current using a quantum point contact constriction paved a way to a large variety of experiments in mesoscopic physics. The increasing interest in heat transfer in such systems fosters questions about possible manipulations of quantum heat modes that do not carry net charge (neutral modes). Here we study the transmission of upstream neutral modes through a quantum point contact in fractional hole-conjugate quantum Hall states. Employing two different measurement techniques, we were able to render the relative spatial distribution of these chargeless modes with their charged counterparts. In these states, which were found to harbor more than one downstream charge mode, the upstream neutral modes are found to flow with the inner charge mode—as theoretically predicted. These results unveil a universal upstream heat current structure and open the path for more complex engineering of heat flows and cooling mechanisms in quantum nano-electronic devices.

Date: 2017
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DOI: 10.1038/s41467-017-02433-z

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