Cusp at ω=2Δ_o(T) in Ultrasound Dispersion Relation of Low Temperature Superfluid ^3He-A

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概要

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• The dispersion relation of the Ultrasound in the low temperature ^3He-A has a cusp just at ω=2Δ_0(T) (Δ_0(T) the maximum gap of ^3He-A). It is shown that the cusp has a nonanalyticity of the form 1/ln|ω/2Δ_0(T)-1|. The output change of acoustic impedance detected recently by Meisel et al., is attributed to this cusp. The dispersion relation including the Landau parameter F_2^S is also given.

• 理論物理学刊行会の論文
• 1983-12-25

著者

• Ashida Masami

  Department Of Earth System Science Faculty Of Science Fukuoka University

• Ashida Masami

  Department Of Physics Yamaguchi University

• NAGAI Katsuhiko

  Department of Physics Yamaguchi University

• Nagai Katsuhiko

  Department Of Physics Faculty Of Science Yamaguchi University

• Nagai Katsuhiko

  Department Of Physics Faculty Of Literature And Science Yamaguchi University

• NAGAI Katsuhiko

  Department of Materials Science and Engineering, Faculty of Engineering, Yamagata University

• Ashida Masami

  Department of Physics, Yamaguchi University

• ASHIDA Masami

  Department of Physics, Tohoku University

• NAGAI Katsuhiko

  Department of Physics, Faculty of Literature and Science Yamaguchi University

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