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Type: Artigo de periódico
Title: Magnetothermal conductivity of highly oriented pyrolytic graphite in the quantum limit
Author: Ocana, R
Esquinazi, P
Kempa, H
Torres, JHS
Kopelevich, Y
Abstract: We report on the magnetic field (0 Tless than or equal toBless than or equal to9 T) dependence of the longitudinal thermal conductivity kappa(T,B) of highly oriented pyrolytic graphite in the temperature range 5 Kless than or equal toTless than or equal to20 K for fields parallel to the c axis. We show that kappa(T,B) shows large oscillations in the high-field region (B>2 T) where clear signs of the quantum-hall effect are observed in the Hall resistance. With the measured longitudinal electrical resistivity we show that the Wiedemann-Franz law is violated in the high-field regime.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.68.165408
Date Issue: 2003
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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