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Letter

Nature Physics 2, 595–599 (1 September 2006) | doi:10.1038/nphys393

First direct observation of Dirac fermions in|[nbsp]|graphite

S. Y. Zhou , G.-H. Gweon , J. Graf , A. V. Fedorov , C. D. Spataru , R. D. Diehl , Y. Kopelevich , D.-H. Lee , Steven G. Louie & A. Lanzara

Originating from relativistic quantum field theory, Dirac fermions have been invoked recently to explain various peculiar phenomena in condensed-matter physics, including the novel quantum Hall effect in graphene, the magnetic-field-driven metal–insulator-like transition in graphite, superfluidity in 3He (ref.|[nbsp]|5) and the exotic pseudogap phase of high-temperature superconductors. Despite their proposed key role in those systems, direct experimental evidence of Dirac fermions has been limited.