Universal behaviour of the thermoelectric power of composite fermions

SURFACE SCIENCE

卷:361

Article; Proceedings Paper

Tieke, B ; Zeitler, U ; Fletcher, R ; Wiegers, SAJ ; Geim, AK ; Maan, JC ; Henini, M

关键词: electrical transport measurements;    gallium arsenide;    heterojunctions;    quantum effects;    semiconductor-semiconductor heterostructures;   

DOI  :  10.1016/0039-6028(96)00327-5

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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