Thermoelectric property of a one dimensional channel in the presence of a transverse magnetic field

Tutkimustuotos: Lehtiartikkeli

Tutkijat

  • Chengyu Yan

  • Michael Pepper
  • Patrick See
  • Ian Farrer
  • David A. Ritchie
  • Jonathan Griffiths

Organisaatiot

  • London Centre for Nanotechnology
  • University College London
  • National Physical Laboratory
  • University of Sheffield
  • Cavendish Laboratory

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli202102
Sivut1-4
JulkaisuApplied Physics Letters
Vuosikerta115
Numero20
TilaJulkaistu - 11 marraskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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