Beyond the Rigid-Ion Approximation with Spherically Symmetric Ions

Authors

• L. L. Boyer, Naval Research Laboratory, Washington, D. C.
• M. J. Mehl, Naval Research Laboratory, Washington, D. C.
• J. L. Feldman, Naval Research Laboratory, Washington, D. C.
• John R. Hardy, University of Nebraska - LincolnFollow
• J. W. Flocken, University of Nebraska at Omaha, Omaha, Nebraska
• C. Y. Fong, University of California at Davis, Davis, California

Document Type

Article

Date of this Version

4-29-1985

Comments

Published in Phys. Rev. B VOLUME 54, NUMBER 17, 29 APRIL 1985. Copyright © 1985 The American Physical Society. Used by permission.

Abstract

Ab initio calculations show that a spherically symmetric charge relaxation of ions in a crystal, in response to the long-range electrostatic potential, is important for understanding the splitting between longitudinal- and transverse-optic-mode frequencies, and the violation of the Cauchy relations among elastic constants.