Analysis of Diffusion Constant and Non-Gaussianity near the Glass Transition Point in the Frequency Domain

• Tagawa Fumitaka

  Department of Physics, Kyushu University

• Odagaki Takashi

  Department of Physics, Kyushu University

• Matsui Jun

  Department of Physics, Kyushu University

抄録

A novel method is developed for estimating the diffusion constant D_c and the non-Gaussian parameter A(t) on the basis of measurement in the frequency region. This method is shown to have merits over the conventional one in which a limited time window is used. To confirm the validity of this method, it is applied to a binary soft-sphere fluid which was studied by molecular dynamics (MD) simulation. The diffusion constant D_c is determined in the region closer to the glass transition than in the conventional MD simulation. The temperature dependence of the exponent of A(t) is consistent with that predicted by the trapping diffusion model.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 74 (7), 1988-1991, 2005

  一般社団法人 日本物理学会

キーワード

• glass transition
• non-Gaussian parameter

詳細情報

• CRID: 1390282679164736128
• NII論文ID: 110001979655
• NII論文ID: 130004539326
• NII論文ID: 210000105542
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.74.1988
• BIBCODE: 2005JPSJ...74.1988T
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7357011
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7357011
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.1988
• 本文言語コード: en
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