Positional and Orientational Correlations in the Graphite Intercalate <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">C</mi></mrow><mrow><mn>24</mn></mrow></msub></mrow></math></span>Cs

Roy Clarke; N. Caswell; S. A. Solin; P. M. Horn

doi:10.1103/PhysRevLett.43.2018

Positional and Orientational Correlations in the Graphite Intercalate $C_{24}$ Cs

Roy Clarke, N. Caswell, S. A. Solin, and P. M. Horn

Phys. Rev. Lett. 43, 2018 – Published 31 December 1979

Abstract

An x-ray study of the Cs layers in $C_{24}$ Cs is presented. The Cs layer has a uniform 2-d liquidlike structure at 300 K not in registry with the graphite layers. A crossover to 3-d interlayer correlation is observed at 165 K. Single-crystal measurements show that the Cs layers rotate relative to the graphite $〈 100 〉$ directions. An orientational ordering between two positionally disordered phases occurs at 228 K and a new transition to a mixed registered phase at 50 K is reported.

Received 6 July 1979

DOI:https://doi.org/10.1103/PhysRevLett.43.2018

Authors & Affiliations

Roy Clarke^*, N. Caswell^†, S. A. Solin^‡, and P. M. Horn^§

James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637

^*Present address: Department of Physics, University of Michigan, Ann Arbor, Mich. 48109.
^†Present address: Department of Physics, University of California, Berkeley, Cal. 94220.
^‡Present address: Department of Physics, Michigan State University, East Lansing, Mich. 48824.
^§Present address: IBM Thomas J. Watson Research Center, Yorktown Heights, N. Y. 10598.