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Type: Artigo de periódico
Title: Nernst effect in semimetals: The effective mass and the figure of merit
Author: Behnia, K
Measson, MA
Kopelevich, Y
Abstract: We present a study of electric, thermal, and thermoelectric transport in elemental bismuth, which presents a Nernst coefficient much larger than what was found in correlated metals. We argue that this is due to the combination of an exceptionally low carrier density with a very long electronic mean-free path. The low thermomagnetic figure of merit is traced to the lightness of electrons. Heavy-electron semimetals, which keep a metallic behavior in the presence of a magnetic field, emerge as promising candidates for thermomagnetic cooling at low temperatures.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review Letters. American Physical Soc, v. 98, n. 7, 2007.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.98.076603
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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