Studies Of Vibrational Surface Modes In Ionic Crystals. II. Surface Enhancement Of The Thermal Mean-squares Amplitudes For The (001) Face Of LiF, MgO, NaF, NaCl, NaI, RbF, And RbCl

Author

T. S. Chen, Missouri University of Science and Technology
G. P. Alldredge
F. W. De Wette

Abstract

The mean-square amplitudes (MSA) and mean-square velocities (MSV) of thermal vibrations have been calculated for the (001) surface of LiF, MgO, NaF, NaCl, NaI, RbF, and RbCl, using shell models. The high-temperature maximum surface enhancement of the MSA, as expressed by the ratio 〈u2⊥(K)〉surf/〈u2⊥(K)〉bulk, ranges from a low of about 1.5 for O- in MgO to a high of about 1.9 for Cl- in RbCl. The calculated surface enhancement of MSA for F- in LiF is 1.65, in good agreement with the value 1.71 drawn from Goodman's analysis of the data on H/LiF scattering obtained by Hoinkes, Nahr, and Wilsch. © 1976.

Recommended Citation

T. S. Chen et al., "Studies Of Vibrational Surface Modes In Ionic Crystals. II. Surface Enhancement Of The Thermal Mean-squares Amplitudes For The (001) Face Of LiF, MgO, NaF, NaCl, NaI, RbF, And RbCl," Surface Science, vol. 57, no. 1, pp. 25 - 36, Elsevier, Jul 1976.

The definitive version is available at https://doi.org/10.1016/0039-6028(76)90164-3

Department(s)

Mechanical and Aerospace Engineering

Comments

Air Force Office of Scientific Research, Grant 71-1973

International Standard Serial Number (ISSN)

0039-6028

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Elsevier, All rights reserved.

Publication Date

01 Jul 1976