Phonon-drag thermopower of composite fermions at filling factor 3/2
✍ Scribed by M Tsaousidou; G.P Triberis
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 80 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1386-9477
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✦ Synopsis
We present, for the ÿrst time, a quantitative interpretation of the measured diagonal thermopower, Sxx, for a 2DEG at ÿlling factor = 3=2. The Sxx data span the temperature range 0:2 6 T 6 1:2 K and show that the phonon-drag thermopower, S g xx , is the dominant contribution at all T . S g xx is calculated by using the standard Cantrell-Butcher formalism within the composite fermion picture. The theoretical results for S g xx agree very well with the experimental data when the value 0:87me for the composite fermion mass at = 3=2 is used. We also calculate the ratio S g xx ( = 3=2)=S g xx ( = 1=2) and we ÿnd that it is unity for T 6 0:5 K which is in very good agreement with the experiment.