Ultrasonic Study for the Charge Ordering of Yb_4As_3 :

• NEMOTO,Yuichi

  Graduate School of Science and Technology, Niigata University

• GOTO,Terutaka

  Graduate School of Science and Technology, Niigata University

• OCHIAI,Akira

  Material Science and Technology, Niigata University

• SUZUKI,Takashi

  The Institute for Solid State Physics, The University of Tokyo

抄録

We measured the elastic constants of low carrier compound Yb_4As_3. The transverse C_<44> mode shows a remarkable softening about 18% from 400 K down to the charge ordering point T_c = 292 K. At T_c the structural phase transition occurs simultaneously. By the group theoretical analysis, we derived the charge fluctuation mode with Γ_5 symmetry coupled to the elastic strain ε_<yz>, ε_<zx>, ε__<xy> of the soft elastic C_<44> mode. The quench of the charge fluctuation mode gives rise to the linear chain of Yb^<3+> ion along the [111] direction.

収録刊行物

• JJAP series

  JJAP series 11 120-122, 1999-02-08

  Japanese Journal of Applied Physics

キーワード

• charge ordering
• structural phase transition
• Yb_4As_3
• low carrier
• ultrasound

詳細情報

• CRID: 1541698620214498048
• NII論文ID: 110003958932
• NII書誌ID: AA11020413
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10472888
• 本文言語コード: en
• データソース種別:
  • NDL-Digital
  • CiNii Articles