The low frequency Raman spectrum of B203 and the boroxol ring vibrational
mode at 808 cm-1 have been studied from room temperature to 1273 K as the
glass transforms to a melt. Both the low frequeney "boson" peak and the boroxol
mode are markedly influenced by the glass transition. Raising the temperature
above Tg the strength of the 808 cm-1 mode decreases linearly indicating the Similar
behavior of the boroxol ring concentration. The boson peak shows a different
temperature behavior, which mirrors that of the sound velo city. The structural
correlation length demostrates the same correlation range in the liquid and the
glass. The results, when compared with neutron diffraction measurements contradict a recently proposed relation between the "boson correlation length" and
the position of the first sharp diffraction peak of the structure factor.
Mutual information does not detect growing correlations in the propensity of a model molecular liquid
