Soft Phonon in the Incommensurate Phases of Bromine and Iodine studied by Raman scattering
نویسندگان
چکیده
A new phase of solid bromine was discovered at a pressure region above 80 GPa by Raman scattering experiments with a diamond anvil cell. This phase was found to be the same as the iodine phase V with an incommensurate structure (Takemura 2003) which appears between the molecular phase I and the monatomic phase II. In the incommensurate phases of bromine and iodine, Raman active soft modes were clearly found in the low frequency region. The Raman data suggest that the monoatomic phase II occurs above 30 and 115 GPa for iodine and bromine, respectively.
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