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Title: Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [4];  [4]; ORCiD logo [5];  [4];  [6]
  1. Hokkaido Univ., Sapporo (Japan)
  2. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
  3. Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany); Dresden Univ. of Technology (Germany)
  4. Univ. of California, San Diego, CA (United States)
  5. Univ. of California, San Diego, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Tohoku Univ., Sendai (Japan); Alternative Energies and Atomic Energy Commission (CEA), Grenoble (France)

In this study, the elastic properties of URu2Si2 in the high magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of high-frequency ultrasonic measurements. The investigation was performed at high magnetic fields to better investigate the innate bare 5f-electron properties, since the unidentified electronic thermodynamic phase of unknown origin, the so-called “hidden order” (HO), and associated hybridization of conduction and f-electrons (c-f hybridization) are suppressed at high magnetic fields. From the three different transverse modes we find contrasting results; both the Γ4(B2g) and Γ5(Eg) symmetry modes C66 and C44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Γ3(B1g) symmetry mode (C11 – C12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Γ3(B1g) lattice instability in URu2Si2. However, the results from this work cannot be explained by using existing crystalline electric field schemes applied to the quadrupolar susceptibility in a local 5f2 configuration. Instead, we present an analysis based on a band Jahn-Teller effect.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
89233218CNA000001; FG02-04-ER46105; JP17K05525(C); JP16H04006; JP15H05882; JP15H05884; JP15H05745; JP15KK0146; JP15K21732; JP23740250; JP23102701
OSTI ID:
1766990
Alternate ID(s):
OSTI ID: 1433456
Report Number(s):
LA-UR-18-28593; TRN: US2206324
Journal Information:
Physical Review B, Vol. 97, Issue 15; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (4)

Evidence for the Single-Site Quadrupolar Kondo Effect in the Dilute Non-Kramers System Y 1 x Pr x Ir 2 Zn 20 journal August 2019
Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu 2 Si 2 journal January 2020
High magnetic field behavior of strongly correlated uranium-based compounds journal October 2017
Pressure-induced rotational symmetry breaking in URu2Si2 text January 2018

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