Research Papers in Physics and Astronomy

 

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.

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