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Thermoelectric power in the quantum-Hall regime at very low temperatures

✍ Scribed by B. Tieke; R. Fletcher; S.A.J. Wiegers; U. Zeitler; J.C. Maan; C.T. Foxon; J.J. Harris

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
226 KB
Volume
211
Category
Article
ISSN
0921-4526

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✦ Synopsis

We have measured the thermoelectric power (TEP) of high mobility 2DEGs in the integer and fractional quantum Hall regime down to 100 mK. At low temperatures, fluctuation-like structures in the TEP are observed. Below 160 mK the TEP diverges around the filling factor v = ~ where the resistivity enters the insulating phase. The temperature dependence of the TEP at filling factors v = 12 and ΒΌ resembles that of the zero field TEP enhanced by a constant factor. This is interpreted in terms of the phonon drag of composite fermions.

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