Int. J. Mol. Sci. 2009, 10(10), 4342-4351; doi:10.3390/ijms10104342
Article

First-Principles Molecular Dynamics Calculations of the Equation of State for Tantalum

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Received: 7 August 2009; in revised form: 15 September 2009 / Accepted: 28 September 2009 / Published: 9 October 2009
(This article belongs to the Special Issue Applications of Density Functional Theory)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The equation of state of tantalum (Ta) has been investigated to 100 GPa and 3,000 K using the first-principles molecular dynamics method. A large volume dependence of the thermal pressure of Ta was revealed from the analysis of our data. A significant temperature dependence of the calculated effective Grüneisen parameters was confirmed at high pressures. This indicates that the conventional approach to analyze thermal properties using the Mie-Grüneisen approximation is likely to have a significant uncertainty in determining the equation of state for Ta, and that an intrinsic anharmonicity should be considered to analyze the equation of state.
Keywords: equation of state; tantalum; high pressure; ab initio calculations
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MDPI and ACS Style

Ono, S. First-Principles Molecular Dynamics Calculations of the Equation of State for Tantalum. Int. J. Mol. Sci. 2009, 10, 4342-4351.

AMA Style

Ono S. First-Principles Molecular Dynamics Calculations of the Equation of State for Tantalum. International Journal of Molecular Sciences. 2009; 10(10):4342-4351.

Chicago/Turabian Style

Ono, Shigeaki. 2009. "First-Principles Molecular Dynamics Calculations of the Equation of State for Tantalum." Int. J. Mol. Sci. 10, no. 10: 4342-4351.


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