Observation of composite-fermion thermopower at half-filled Landau levels

X. Ying, V. Bayot, M. B. Santos, M. Shayegan

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Measurements of the diagonal magnetothermopower (Sxx) of a high-quality two-dimensional hole system reveal that in the diffusion regime (T<100 mK), Sxx at filling factors =1/2 and 3/2 depends approximately linearly on temperature and has a much smaller magnitude than expected for noninteracting particles at half-filled Landau levels. We show that both the temperature dependence and the magnitude of Sxx at these two fillings can be explained remarkably well based on a recently proposed particle-flux composite-fermion picture.

Original languageEnglish (US)
Pages (from-to)4969-4972
Number of pages4
JournalPhysical Review B
Volume50
Issue number7
DOIs
StatePublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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