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

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/71004

Title: Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field
Authors: Yanagisawa, Tatsuya Browse this author →KAKEN DB
Mombetsu, Shota Browse this author
Hidaka, Hiroyuki Browse this author
Amitsuka, Hiroshi Browse this author →KAKEN DB
Cong, P. T. Browse this author
Yasin, S. Browse this author
Zherlitsyn, S. Browse this author
Wosnitza, J. Browse this author
Huang, K. Browse this author
Kanchanavatee, N. Browse this author
Janoschek, M. Browse this author
Maple, M. B. Browse this author
Aoki, D. Browse this author
Issue Date: 17-Apr-2018
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 97
Issue: 15
Start Page: 155137
Publisher DOI: 10.1103/PhysRevB.97.155137
Abstract: 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 Gamma(4)(B-2g) and Gamma(5)(E-g) symmetry modes C-66 and C-44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Gamma(3)(B-1g) symmetry mode (C-11 - C-12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Gamma(3)(B-1g) 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 5f(2) configuration. Instead, we present an analysis based on a band Jahn-Teller effect.
Rights: ©2018 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/71004
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柳澤 達也

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