Y. Lin et al., EFFECT OF MAGNETIC FLUCTUATIONS ON RAMAN-SCATTERING IN KAPPA-(BEDT-TTF)(2)CU(NCS)(2), Physical review. B, Condensed matter, 58(2), 1998, pp. 599-602
The temperature dependence of the intensity and frequency of two inten
se features in the Raman spectrum of kappa-(BEDT-TTF)(2)Cu(NCS)(2) hav
e been measured. The spectra were taken with a Fourier Raman spectrome
ter equipped with an infrared laser. The two lines are due to a strong
ly resonant nu(9)(A(g)) doublet, and a sharp line due to nu(60) (B-3g)
. The frequencies of these modes are observed to soften below 80 K, in
the temperature range where antiferromagnetic spin fluctuations have
been observed with NMR, providing evidence of interactions between the
phonons and the magnetism. [S0163-1829(98)50926-5].