Je. Eldridge et al., INFRARED OPTICAL-PROPERTIES OF THE ORGANIC SUPERCONDUCTOR KAPPA(L)-(BEDT-TTF)(2)CU(CF3)(4)CENTER-DOT-TCE (T-C=4K), Solid state communications, 99(5), 1996, pp. 335-340
We present measurements of the polarized infrared reflectivity at 10 K
from a single crystal of kappa(L)-(BEDT-TTF)(2)Cu(CF3)(4) . TCE, whic
h is the first BEDT-TTF superconductor with an organometallic anion (T
-c = 4 K). The resulting conductivity spectra are similar to those of
the highest-T-c BEDT-TTF superconductors with polymeric anions such as
(BEDT-TTF)(2)Cu[N(CN)(2)]Br, but show signs of the disorder which is
present, and also show this compound to be less two-dimensional than (
BEDT-TTF)(2)Cu[N(CN)(2)] Br. We have identified infrared and Raman fea
tures which are due to the vibrations of the CU(CF3)(4)(-) anion, and
with the help of a small amount of group theory have assigned some of
them to their symmetry species. Copyright (C) 1996 Elsevier Science Lt
d