Specific heat of C-60 and K3C60 thin films for T=6-400 K

Authors
Allen, K Hellman, F
Citation
K. Allen et F. Hellman, Specific heat of C-60 and K3C60 thin films for T=6-400 K, PHYS REV B, 60(16), 1999, pp. 11765-11772
Citations number
37
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
16
Year of publication
1999
Pages
11765 - 11772
Database
ISI
SICI code
0163-1829(19991015)60:16<11765:SHOCAK>2.0.ZU;2-5
Abstract
Using a microcalorimeter, we have measured the specific heat of C-60 and K3 C60 thin films from 6-400 K. The results can be understood by analyzing the phonon modes; the electronic specific heat of K3C60 is a small fraction of the total. While C-60 displays a clear separation of energy levels between interball and intraball modes, the added (alkali) optical modes in K3C60 b lur this separation because they appear in the gap. Additionally, the acous tic modes of K3C60 soften compared to pure C-60. [S0163-1829(99)01039-5].