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Quantitative interpretation of thermopower data for composite fermions in a half-filled Landau level

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UNSPECIFIED (1999) Quantitative interpretation of thermopower data for composite fermions in a half-filled Landau level. PHYSICAL REVIEW LETTERS, 83 (23). pp. 4820-4823. ISSN 0031-9007.

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Abstract

Thermopower data for two 2DEGs with nu = 1/2 at temperatures 0.2 less than or equal to T less than or equal to 1.2 K are explained using the composite fermion (CF) approach. Phonon-drag thermopower dominates at all temperatures and is treated within the Cantrell-Butcher framework. For T greater than or equal to 1 K the calculated values agree with the data very well. At lower T the theory increasingly underestimates the data. This discrepancy is removed completely by modifying the CF-phonon piezoelectric coupling to account for the Chern-Simons gauge field. The only adjustable parameter is the CF mass which is taken to be 1.5m(c).

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: PHYSICAL REVIEW LETTERS
Publisher: AMERICAN PHYSICAL SOC
ISSN: 0031-9007
Official Date: 6 December 1999
Dates:
DateEvent
6 December 1999UNSPECIFIED
Volume: 83
Number: 23
Number of Pages: 4
Page Range: pp. 4820-4823
Publication Status: Published

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