Phys. Rev. Lett. 96, 035507 (2006) [4 pages]Lattice Dynamics of MgO at High Pressure: Theory and ExperimentReceived 27 February 2005; published 26 January 2006 The longitudinal acoustic and optical phonon branches along the Γ-X direction of MgO at 35 GPa have been determined by inelastic x-ray scattering using synchrotron radiation and a diamond-anvil cell. The experimentally observed phonon branches are in remarkable agreement with ab initio lattice dynamics results. The derived thermodynamic properties, such as the specific heat CV and the entropy S are in very good accord with values obtained from a thermodynamically assessed data set involving measured data on molar volume, heat capacity at constant pressure, bulk modulus and thermal expansion. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.035507
DOI:
10.1103/PhysRevLett.96.035507
PACS:
62.50.+p, 63.20.−e, 78.70.Nx
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.