Neutron scattering study of the normal-incommensurate phase transition in Rb_2ZnBr_4

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概要

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• The soft phonon modes, which are related to the normal-incommensurate phase transition of Rb_2ZnBr_4, have been measured by inelastic neutron scattering. The existence of both phase and amplitude modes has been confirmed, and the phonon dispersion curves have been determined in the low-temperature commensurate phase. On the other hand, the phonon dispersion curve of the transverse acoustic phonon along the (0 0 ξ) direction does not vary appreciably in the normal phase. The soft mode is fully overdamped above the normal-incommensurate phase transition. Diffuse scattering develops around h0l±5/17 as temperature approaches T_i ＝347 K from above.

• 社団法人日本物理学会の論文
• 2000-09-15

著者

• OOHARA Yasuaki

  Institute for Solid State Physics, The University of Tokyo

• Oohara Yasuaki

  Institude For Solid State Physics University Of Tokyo

• Ohshima Ken-ichi

  Institute Of Materials Science University Of Tsukuba

• MATSUI Tsuneo

  Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya Univ

• Takesada Masaki

  Research Institute for Electronic Science, Hokkaido University

• SHIGEMATSU Hirotake

  Department of Quantum Engineering,Graduate School of Engineering,Nagoya University

• MASHIYAMA Hiroyuki

  Department of Physics,Faculty of Science,Yamaguchi University

• Ohshima Ken-ichi

  Institute Of Applide Physics University Of Tsukuba

• Mashiyama Hiroyuki

  Department Of Physics Biology And Informatics Faculty Of Science Yamaguchi University

• Mashiyama Hiroyuki

  Department Of Physics Yamaguchi University

• Shigematsu Hirotake

  Faculty Of Education Shimane University

• Shigematsu Hirotake

  Department Of Quantum Engineering Graduate School Of Engineering Nagoya University

• Matsui T

  Kinki Univ. Higashi‐osaka

• Matsui Tsuneo

  Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers

• Takesada Masaki

  Research Institute For Electronic Science Hokkaido University

• Mashiyama H

  Faculty Of Science Yamaguchi University

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