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Type: Artigo de periódico
Title: Oscillating Nernst-Ettingshausen effect in bismuth across the quantum limit
Author: Behnia, K
Measson, MA
Kopelevich, Y
Abstract: In elemental bismuth, 10(5) atoms share a single itinerant electron. Therefore, a moderate magnetic field can confine electrons to the lowest Landau level. We report on the first study of metallic thermoelectricity in this regime. The main thermoelectric response is off-diagonal with an oscillating component several times larger than the nonoscillating background. When the first Landau level attains the Fermi energy, both the Nernst and the Ettingshausen coefficients sharply peak, and the latter attains a temperature-independent maximum. These features are yet to be understood. We note a qualitative agreement with a theory invoking current-carrying edge excitations.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review Letters. American Physical Soc, v. 98, n. 16, 2007.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.98.166602
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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