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Type: Artigo de periódico
Title: Phase analysis of quantum oscillations in graphite
Author: Luk'yanchuk, IA
Kopelevich, Y
Abstract: The quantum de Haas-van Alphen (dHvA) and Shubnikov-de Haas oscillations measured in graphite were decomposed by pass-band filtering onto contributions from three different groups of carriers. Generalizing the theory of dHvA oscillations for 2D carriers with an arbitrary spectrum and by detecting the oscillation frequencies using a method of two-dimensional phase-frequency analysis which we developed, we identified these carriers as (i) minority holes having a 2D parabolic massive spectrum p(perpendicular to)(2)/2m(perpendicular to), (ii) massive majority electrons with a 3D spectrum and (iii) majority holes with a 2D Dirac-like spectrum +/-vp(perpendicular to) which seems to be responsible for the unusual strongly-correlated electronic phenomena in graphite.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.93.166402
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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