Chiatti, O;
Nicholls, JT;
Proskuryakov, YY;
Lumpkin, N;
Farrer, I;
Ritchie, DA;
(2006)
Quantum thermal conductance of electrons in a one-dimensional wire.
Physical Review Letters
, 97
(5)
, Article 056601. 10.1103/PhysRevLett.97.056601.
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Abstract
We use an electron thermometer to measure the temperature rise of approximately 2x10(5) electrons in a two-dimensional box, due to heat flow into the box through a ballistic one-dimensional (1D) constriction. Using a simple model we deduce the thermal conductance kappa(V-g) of the 1D constriction, which we compare to its electrical conductance characteristics; for the first four 1D subbands the heat carried by the electrons passing through the wire is proportional to its electrical conductance G(V-g). In the vicinity of the 0.7 structure this proportionality breaks down, and a plateau at the quantum of thermal conductance pi(2)k(B)(2)T/3h is observed.
| Type: | Article |
|---|---|
| Title: | Quantum thermal conductance of electrons in a one-dimensional wire |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.97.056601 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.97.056601 |
| Language: | English |
| Additional information: | © 2006 The American Physical Society |
| Keywords: | POINT CONTACTS, GAS, QUANTIZATION, TRANSPORT |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/20434 |
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