Boson Peak Investigation Of Unusual Disproportionated Amorphous Silicon Monoxide By Terahertz SpectroscopyPaper (MM1)
Mon, 09 Nov 2020 03:45pm to 04:00pm
To investigate multi-boson peaks (multi-BP), terahertz time-domain spectroscopy was performed on amorphous silicon monoxide (a-SiO), which exhibits unusual disproportion in the nanoscale region where the SiO2 and Si regions are separated. In the resulting THz spectrum, the BP was observed at 2.4 THz, as a broad asymmetric peak, and the BP frequency was evidently higher than that of silica glass. The results suggest that the higher BP frequency of a-SiO in the infrared spectrum originates from the a-Si cluster region.
Authors: Mori, Tatsuya; Masubuchi, Maiko; Fujii, Yasuhiro; Kitani, Suguru; Kohara, Shinji; Hirata, Akihiko; Tokoro, Hiroko; Ohkoshi, Shin-ichi; Koreeda, Akitoshi; Kawaji, Hitoshi; Kojima, Seiji
National Institute for Materials Science (NIMS), Ritsumeikan University, The University of Tokyo, Tokyo Institute of Technology, University of Tsukuba, Waseda University