Terahertz Spectroscopic Study on Protein Myoglobin: Polymer-Like Behavior of Vibrational Density of States

ORAL

Abstract

We performed terahertz time-domain spectroscopy on protein myoglobin to investigate the boson peak dynamics which universally appears in glassy materials and fracton which is expected to universally appear in polymer glasses. The obtained spectral shape of log ε'' vs log frequency [ε'': the imaginary part of complex dielectric constants] indicates that the fracton region appears above the boson peak frequency. The fractal and fracton dimensions were evaluated from the obtained spectra.

*This work was partially supported by JSPS KAKENHI Grants No. 17K14318, No. 18H04476 and No. 26287067, and the Asahi Glass Foundation.

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Presenters

  • Leona Motoji

    • Division of Materials Science, University of Tsukuba

Authors

  • Leona Motoji

    • Division of Materials Science, University of Tsukuba

  • Tatsuya Mori

    • Division of Materials Science, University of Tsukuba

  • Yasuhiro Fujii

    • Department of Physical Sciences, Ritsumeikan University

  • Akitoshi Koreeda

    • Department of Physical Sciences, Ritsumeikan University

  • Yue Jiang

    • Division of Materials Science, University of Tsukuba

  • Kentaro Shiraki

    • Division of Materials Science, University of Tsukuba

  • Yohei Yamamoto

    • Division of Materials Science, University of Tsukuba

  • Seiji Kojima

    • Division of Materials Science, University of Tsukuba