You need JavaScript to view this

Lattice Dynamics of NaCI, KCI, RbCl and RbF

Abstract

In a series of earlier papers experimental results on phonon dispersion relations at 80 K in NaCl, KCl, RbCl and RbF have been reported. We now present calculations on these halides using the extended shell model approach with both ions polarizable and including next-nearest neighbour interactions. The parameters obtained in a least squares fit to the experimental points in the symmetry directions have been used to calculate the phonon frequencies in 512,000 equally spaced points in an octant of the Brillouin zone, -whereby, after sorting these into intervals of width {delta}{omega} = 2 x 10{sup 11} rad/sec , the frequency spectrum was obtained. From these spectra the variation of the Debye temperature with temperature was also calculated. The agreement with results from specific heat measurements for NaCl and KCl is quite satisfactory at low temperatures.
Authors:
Raunio, G; Rolandson, S [1] 
  1. Physics Dept., Chalmers Univ. of Technology, Goet eborg (Sweden)
Publication Date:
Jul 01, 1970
Product Type:
Technical Report
Report Number:
AE-384
Resource Relation:
Other Information: 17 refs., 3 , 3 figs., 3 tabs.
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; SODIUM CHLORIDES; POTASSIUM CHLORIDES; RUBIDIUM CHLORIDES; RUBIDIUM FLUORIDES; PHONONS; DISPERSION RELATIONS
OSTI ID:
20961859
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708777
Availability:
Commercial reproduction prohibited; OSTI as DE20961859
Submitting Site:
SWDN
Size:
30 pages
Announcement Date:
Dec 29, 2007

Citation Formats

Raunio, G, and Rolandson, S. Lattice Dynamics of NaCI, KCI, RbCl and RbF. Sweden: N. p., 1970. Web.
Raunio, G, & Rolandson, S. Lattice Dynamics of NaCI, KCI, RbCl and RbF. Sweden.
Raunio, G, and Rolandson, S. 1970. "Lattice Dynamics of NaCI, KCI, RbCl and RbF." Sweden.
@misc{etde_20961859,
title = {Lattice Dynamics of NaCI, KCI, RbCl and RbF}
author = {Raunio, G, and Rolandson, S}
abstractNote = {In a series of earlier papers experimental results on phonon dispersion relations at 80 K in NaCl, KCl, RbCl and RbF have been reported. We now present calculations on these halides using the extended shell model approach with both ions polarizable and including next-nearest neighbour interactions. The parameters obtained in a least squares fit to the experimental points in the symmetry directions have been used to calculate the phonon frequencies in 512,000 equally spaced points in an octant of the Brillouin zone, -whereby, after sorting these into intervals of width {delta}{omega} = 2 x 10{sup 11} rad/sec , the frequency spectrum was obtained. From these spectra the variation of the Debye temperature with temperature was also calculated. The agreement with results from specific heat measurements for NaCl and KCl is quite satisfactory at low temperatures.}
place = {Sweden}
year = {1970}
month = {Jul}
}