| 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)
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