Yan, C;
Pepper, M;
See, P;
Farrer, I;
Ritchie, DA;
Griffiths, J;
(2019)
Thermoelectric property of a one dimensional channel in the presence of a transverse magnetic field.
Applied Physics Letters
, 115
(20)
, Article 202102. 10.1063/1.5128906.
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Abstract
We studied the thermal conduction through a quantum point contact (QPC), defined in a GaAs-AlxGa1-x As heterostructure, in the presence of a transverse magnetic field. A shift in the position of a thermo-voltage peak is observed with increasing field. The position of the thermo-voltage peak follows the Cutler-Mott relation in the small field regime (B<0.5 T); it starts diverging from the Cutler-Mott relation in the moderate field regime, where a cubic magnetic field term dominates over the trivial quadratic term; eventually, the shift saturates in the large field regime (B>3.0 T). Our results suggest that additional calibration is necessary when using QPC as thermometry, especially when the transverse magnetic field is applied.
| Type: | Article |
|---|---|
| Title: | Thermoelectric property of a one dimensional channel in the presence of a transverse magnetic field |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.5128906 |
| Publisher version: | https://doi.org/10.1063/1.5128906 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10086290 |
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