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Universal behaviour of the thermoelectric power of composite fermions
Tieke, B; Zeitler, U; Fletcher, R; Wiegers, S A J; Geim, A K; Maan, J C; Henini, M
Surface Science. 1996;362(1-3):46-49.
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Abstract
The thermopowers of high-mobility two-dimensional electron gases at even denominator filling factors nu are found to be remarkably similar to each other and also to the thermopower at zero magnetic field. The magnitudes at nu=1/2 and nu=3/2 are identical regardless of temperature and electron density. This also appears to be true at nu=1/4 and nu=3/4, with the magnitude of this pair being about two times larger than for the former pair. These results are interpreted in terms of the ''zero field'' phonon drag thermopower of composite fermions.
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electrical transport measurements; gallium arsenide; heterojunctions; landau-level; mass; quantum effects; quantum-hall regime; semiconductor-semiconductor heterostructures
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- Related website <Go to ISI>://A1996UZ03300013
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