Measurement of anisotropies of the kinetic energy and anharmonicity in pyrolytic graphite by neutron Compton scattering
Fielding, A.L., Timms, D.N., & Mayers, J. (1998) Measurement of anisotropies of the kinetic energy and anharmonicity in pyrolytic graphite by neutron Compton scattering. Europhysics Letters, 44(2), pp. 255-260.
Neutron Compton scattering (NCS) measurements of the anisotropy of the momentum distribution and the mean Laplacian of the interatomic potential ∇2V have been performed using electron volt neutrons, with wave vector transfers between 24 Å−1 and 98 Å−1. The measured momentum distribution of the atoms displays significantly more anisotropy than a calculation using a model density of states. We have observed anisotropies in ∇2V for the first time. The results suggest that the atomic potential is harmonic within the graphite planes, but anharmonic for vibrations perpendicular to the planes.
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|Item Type:||Journal Article|
|Additional Information:||Times Cited: 23
Fielding, AL Timms, DN MAyers, J
|Subjects:||Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > CONDENSED MATTER PHYSICS (020400) > Condensed Matter Physics not elsewhere classified (020499)|
|Divisions:||Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > Physics
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||17 Apr 2013 22:50|
|Last Modified:||24 Apr 2013 05:58|
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