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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Rosenblatt A,Lafont F,Levkivskyi I,Sabo R,Gurman I,Banitt D,Heiblum M,Umansky Vdoi
10.1038/s41467-017-02433-zsubject
Has Abstractpub_date
2017-12-21 00:00:00pages
2251issue
1issn
2041-1723pii
10.1038/s41467-017-02433-zjournal_volume
8pub_type
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