Carbon self-diffusion in a natural diamond

Kenneth T. Koga; Micheal J. Walter; Eizo Nakamura; Katsura Kobayashi

doi:10.1103/PhysRevB.72.024108

Carbon self-diffusion in a natural diamond

Kenneth T. Koga
, Micheal J. Walter
, Eizo Nakamura
, Katsura Kobayashi

Institute for Planetary Materials

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

We report experimentally determined self-diffusion coefficients for carbon in a type-IaA diamond at pressure and temperature conditions within diamond stability field at 10GPa and 2075-2375K. The activation energy of diffusion is 6.8±1.6eV and a preexponent constant is of 4.1×10-5m2s [ln(-10.1±2.0)m2s]. The activation energy is approximately 30% lower than results predicted previously from ab initio calculations.

Original language	English
Article number	024108
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.72.024108
Publication status	Published - Jul 1 2005

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.72.024108

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abstract = "We report experimentally determined self-diffusion coefficients for carbon in a type-IaA diamond at pressure and temperature conditions within diamond stability field at 10GPa and 2075-2375K. The activation energy of diffusion is 6.8±1.6eV and a preexponent constant is of 4.1{\texttimes}10-5m2s [ln(-10.1±2.0)m2s]. The activation energy is approximately 30\% lower than results predicted previously from ab initio calculations.",

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AU - Walter, Micheal J.

AU - Nakamura, Eizo

AU - Kobayashi, Katsura

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AB - We report experimentally determined self-diffusion coefficients for carbon in a type-IaA diamond at pressure and temperature conditions within diamond stability field at 10GPa and 2075-2375K. The activation energy of diffusion is 6.8±1.6eV and a preexponent constant is of 4.1×10-5m2s [ln(-10.1±2.0)m2s]. The activation energy is approximately 30% lower than results predicted previously from ab initio calculations.

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Carbon self-diffusion in a natural diamond

Abstract

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