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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
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Abstract
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.
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