Thermoelectric property of a one dimensional channel in the presence of a transverse magnetic field
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2019-11-11
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en
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1-4
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Applied Physics Letters, Volume 115, issue 20
Abstract
We studied the thermal conduction through a quantum point contact (QPC), defined in a GaAs- Al x Ga 1 - 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.Description
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Yan, C, Pepper, M, See, P, Farrer, I, Ritchie, D A & Griffiths, J 2019, ' Thermoelectric property of a one dimensional channel in the presence of a transverse magnetic field ', Applied Physics Letters, vol. 115, no. 20, 202102, pp. 1-4 . https://doi.org/10.1063/1.5128906