Detection of Boson Peak of Densified Silica Glass by Terahertz Time-Domain Spectroscopy

ORAL

Abstract

We performed terahertz time-domain spectroscopy on densified silica glasses to investigate the boson peak (BP) dynamics. BP is a low energy excitation universally observed in the THz region of the glass material. In the spectra of α(ν)/ν2 [α(ν) is the absorption coefficient], BP were observed. Infrared light-vibration coupling coefficient CIR(ν) was determined using the α(ν) and vibrational density of states g(ν) obtained from the low-temperature specific heat measurement, and the charge fluctuations of the densified silica glasses were quantitatively evaluated.

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Presenters

  • Tatsuya Mori

    Division of Materials Science, University of Tsukuba

Authors

  • Tatsuya Mori

    Division of Materials Science, University of Tsukuba

  • Koki Nakano

    Division of Materials Science, University of Tsukuba

  • Yasuhiro Fujii

    Department of Physical Sciences, Ritsumeikan University

  • Suguru Kitani

    Materials and Structures Laboratory, Tokyo Institute of Technology

  • Shinji Kohara

    Light/Quantum Beam Field, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science

  • Norimasa Nishiyama

    Materials and Structures Laboratory, Tokyo Institute of Technology

  • Atsunobu Masuno

    Graduate School of Science and Technology, Hirosaki University

  • Akitoshi Koreeda

    Department of Physical Sciences, Ritsumeikan University

  • Hitoshi Kawaji

    Materials and Structures Laboratory, Tokyo Institute of Technology

  • Seiji Kojima

    University of Tsukuba, Division of Materials Science, University of Tsukuba, Graduate School of Pure and Applied Sciences, University of Tsukuba