Negative Thermal Expansion Coefficient of Diamond Structure Crystal

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概要

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• Using the adiabatic potential in the bond charge model, the phonon dispersion relation and the Gruneisen constant are calculated for Si with the magnitude of the bond charge and its volume change taken as adjustable parameters. It is shown that the Gruneisen constant for the transverse acoustic mode is positive at small wave-numbers and negative at large wave-numbers. This anomalous behavior comes from the positive volume dependence of the bond charge and is the origin of the negative thermal expansion.

• 社団法人日本物理学会の論文
• 1975-11-15

著者

• Ishida Ikuji

  Department Of Physics Faculty Of Science Kyoto University

関連論文

• Electronic State of Metal Surface with Random Distribution of Atoms
• Note on Vibrations of a Chain with Glass-Like Disordor
• Negative Thermal Expansion Coefficient of Diamond Structure Crystal
• Vibrations of a Chain with Glass-Like Disorder

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