Hybridization-driven orthorhombic lattice instability in URu2Si2
Hybridization-driven orthorhombic lattice instability in URu2Si2
Yanagisawa, T.; Mombetsu, S.; Hidaka, H.; Amitsuka, H.; Akatsu, M.; Yasin, S.; Zherlitsyn, S.; Wosnitza, J.; Huang, K.; Janoschek, M.; Maple, M. B.
We have measured the elastic constant (C
11-C
12)/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 (C
11-C
12)/2 that appears only in the temperature and magnetic field region in which URu2Si2 exhibits a heavy-electron state and hidden order. This change in (C
11-C
12)/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.
Involved research facilities
- High Magnetic Field Laboratory (HLD)
-
Physical Review B 88(2013), 195150
Online First (2013) DOI: 10.1103/PhysRevB.88.195150
Cited 17 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-19464