Γ₃-Type Lattice Instability and the Hidden Order of URu₂Si₂

• Yanagisawa, Tatsuya

• Mombetsu, Shota

• Hidaka, Hiroyuki

• Amitsuka, Hiroshi

• Akatsu, Mitsuhiro

• Yasin, Shadi

• Zherlitsyn, Gergei

• Wosnitza, Jochen

• Huang, Kevin

• Maple, M. Brian

Bibliographic Information

Other Title

• Γ3-type Lattice Instability and the Hidden Order of URu2Si2

Abstract

We have performed ultrasonic measurements on single-crystalline URu2Si2 with pulsed magnetic fields, in order to check for possible lattice instabilities due to the hybridized state and the hidden-order state of this compound. The elastic constant (C11-C12)/2, which is associated with a response to the Γ3-type symmetry-breaking (orthorhombic) strain field, shows a three-step increase at H 35 T for H k c at low temperatures, where successive meta-magnetic transitions are observed in the magnetization. We discovered a new fact that the absolute change of the softening of (C11-C12)/2 in the temperature dependence is quantitatively recovered at the suppression of hybridized-electronic state and the hidden order in high-magnetic field for H k c associated with the successive transitions. The present results suggest that the Γ3-type lattice instability, is related to both the emergence of the hybridized electronic state and the hidden-order parameter of URu2Si2. On the other hand, magnetic fields H k [100] and [110] enhance the softening of (C11-C12)/2 in the hidden order phase, while no step-like anomaly is observed up to 68.7 T.We discuss the limitation of the localized-electron picture for describing these features of URu2Si2 by examination of a crystalline electric field model in terms of mean-field theory.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 82 013601-, 2013

  Physical Society of Japan

Keywords

• URu2Si2
• hidden order
• elastic constant
• ultrasound
• pulsed-magnetic field

Details

• CRID: 1050282813989842432
• NII Article ID: 210000132336
• NII Article ID: 40019545050
• NII Book ID: AA00704814
• DOI: 10.7566/jpsj.82.013601
• ISSN: 00319015
• ISSN: 13474073
• HANDLE: 2115/51134
• NDL BIB ID: 024195201
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024195201
• Web Site: http://journals.jps.jp/doi/pdf/10.7566/JPSJ.82.013601
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • NDL
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  • CiNii Articles
  • KAKEN