CALCULATION OF THE PHONON-SPECTRUM AND THE SUPERCONDUCTING CRITICAL-TEMPERATURE OF KC(2)

Authors
LANG L DOYENLANG S CHARLIER A CHARLIER MF
Citation
L. Lang et al., CALCULATION OF THE PHONON-SPECTRUM AND THE SUPERCONDUCTING CRITICAL-TEMPERATURE OF KC(2), Carbon, 32(1), 1994, pp. 3-9
Citations number
15
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Carbon → ACNP
ISSN journal
00086223
Volume
32
Issue
1
Year of publication
1994
Pages
3 - 9
Database
ISI
SICI code
0008-6223(1994)32:1<3:COTPAT>2.0.ZU;2-X
Abstract
We propose here a theoretical method using the De Launay model to calc ulate phonon dispersion curves and density of states g(nu) of KC(n)(wi th n = 2, 3, 6, and 8). With those curves, we evaluate the specific he at C(v) the Debye temperature theta(D), and the lambda parameter used in McMillan's formula with the help of the measured superconducting tr ansition temperature T(c). The curve lambda versus the density of inte rcalated potassium permits the evaluation of the critical temperature of KC2 compound.