F. Ramaz, J.-C. Vial, et al.
EPL
We have studied orientational disorder in the molecular charge-transfer crystals naphthalene-tetracyanobenzene (N-TCNB) and naphthalene-pyromellitic dianhydride (N-PMDA) by Raman scattering from low frequency intermolecular modes. From the temperature dependence of intensities and linewidths we find strong evidence for an order-disorder transition in naphthalene-TCNB at 63 K in which the center of symmetry is removed. In naphthalene-PMDA, on the other hand, the spectrum is consistent with an ordered structure in which the molecules exhibit anharmonic motion at high temperatures. Copyright © 1977 American Institute of Physics.
F. Ramaz, J.-C. Vial, et al.
EPL
M.-P. Bernal, H. Coufal, et al.
Applied Optics
H. Guenther, R.M. Macfarlane, et al.
CLEO 1998
R.M. Macfarlane
Optics Letters