Transmission of heat modes across a potential barrier
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 counter-parts. 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.
Keywords
Cite
@article{arxiv.1712.08413,
title = {Transmission of heat modes across a potential barrier},
author = {Amir Rosenblatt and Fabien Lafont and Ivan Levkivskyi and Ron Sabo and Itamar Gurman and Daniel Banitt and Moty Heiblum and Vladimir Umansky},
journal= {arXiv preprint arXiv:1712.08413},
year = {2017}
}