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Hybridization-driven orthorhombic lattice instability in $URu_{2}Si_{2}$

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Title: Hybridization-driven orthorhombic lattice instability in $URu_{2}Si_{2}$
Authors: Yanagisawa, T. Browse this author
Mombetsu, S. Browse this author
Hidaka, H. Browse this author
Amitsuka, H. Browse this author
Akatsu, M. Browse this author
Yasin, S. Browse this author
Zherlitsyn, S. Browse this author
Wosnitza, J. Browse this author
Huang, K. Browse this author
Janoschek, M. Browse this author
Maple, M. B. Browse this author
Issue Date: 26-Nov-2013
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 88
Issue: 19
Start Page: 195150-1
End Page: 195150-5
Publisher DOI: 10.1103/PhysRevB.88.195150
Abstract: We have measured the elastic constant $(C_{11}-C_{12})/2$ in $UR_{u2}Si_2$ by means of high-frequency ultrasonic measurements in pulsed magnetic fields $H \parallel [001]$ up to 61.8 T in a wide temperature range from 1.5 to 116 K. We found a reduction of $(C_{11}-C_{12})/2$ that appears only in the temperature and magnetic field region in which $UR_{u2}Si_2$ exhibits a heavy-electron state and hidden-order. This change in $(C_{11}-C_{12})/2$ appears to be a response of the 5$\it{f}$-electrons to an orthorhombic and volume conservative strain field $є_{xx}-є_{yy}$ with $Γ_3$ symmetry. This lattice instability is likely related to a symmetry- breaking band instability that arises due to the hybridization of the localized $\it{f}$ electrons with the conduction electrons, and is probably linked to the hidden-order parameter of this compound.
Rights: ©2013 American Physical Society
Type: article
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柳澤 達也

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