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Electrical resistivity of single crystal graphite under pressure: an anisotropic 3-D semimetal
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
1998 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, Vol. 57, no 11, 6227-6230 p.Article in journal (Refereed) Published
Abstract [en]

The in-plane (ρa) and c-axis (ρc) resistivities of natural single-crystal graphite have been measured from 4 to 450 K at zero pressure and from 77 to 450 K under pressures up to 500 MPa. Data for ρc differ strongly from earlier results obtained on synthetic graphite in showing a strong T dependence of the pressure coefficient, while data for ρa agree well with those from previous studies. Our results can be analyzed quantitatively in a simple free-electron model, and we conclude that in contrast to quasi-two-dimensional synthetic graphite, natural single-crystal graphite is an anisotropic three-dimensional semimetal.

Place, publisher, year, edition, pages
American Physical Society , 1998. Vol. 57, no 11, 6227-6230 p.
Keyword [en]
Graphite, single crystal graphite, natural graphite, resistivity, resistance, anisotropy, metal, semimetal, band structure, in-plane resistivity, c-axis resistivity
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-23332DOI: 10.1103/PhysRevB.57.6227OAI: oai:DiVA.org:umu-23332DiVA: diva2:223124
Available from: 2009-06-11 Created: 2009-06-11 Last updated: 2009-12-14

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Publisher's full texthttp://link.aps.org/doi/10.1103/PhysRevB.57.6227

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Edman, LudvigSundqvist, Bertil

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