2013年11月26日
Hybridization-driven orthorhombic lattice instability in URu <inf>2</inf>Si<inf>2</inf>
Physical Review B - Condensed Matter and Materials Physics
- 巻
- 88
- 号
- 19
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.88.195150
We have measured the elastic constant (C11-C12)/2 in URu2Si2 by means of high-frequency ultrasonic measurements in pulsed magnetic fields H [001] up to 61.8 T in a wide temperature range from 1.5 to 116 K. We found a reduction of (C11-C12)/2 that appears only in the temperature and magnetic field region in which URu 2Si2 exhibits a heavy-electron state and hidden order. This change in (C11-C12)/2 appears to be a response of the 5f electrons to an orthorhombic and volume conservative strain field εxx-εyy with Γ3 symmetry. This lattice instability is likely related to a symmetry-breaking band instability that arises due to the hybridization of the localized f electrons with the conduction electrons and is probably linked to the hidden-order parameter of this compound. © 2013 American Physical Society.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevB.88.195150
- ISSN : 1098-0121
- eISSN : 1550-235X
- SCOPUS ID : 84890333199