We report a Raman spectroscopy study of B12As2 under hydrostatic pressure up to 15 GPa. Mode Gruneisen parameters were determined for the B12As2 phonon modes. Phonon modes attributed to the As-As chain have a weak pressure dependence (0.6-1.9 cm(-1) GPa(-1)) relative to inter- and intra-icosahedral vibrations (3.4-6.6 cm(-1) GPa(-1)). The pressure dependence of B12As2 phonon frequencies is compared to those reported for alpha-boron and the origin of the mode at 505 cm(-1) with its weak pressure dependence is discussed.
|Translated title of the contribution||Raman spetroscopy of B12As2 under high pressure|
|Pages (from-to)||910 - 912|
|Number of pages||3|
|Journal||Journal of Applied Physics|
|Publication status||Published - 2004|