Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Q64: UTe2 and Actinide Heavy Fermion Materials
3:00 PM–5:36 PM,
Wednesday, March 16, 2022
Room: Hyatt Regency Hotel -Grant Park B
Sponsoring
Unit:
DCMP
Chair: Brian Casas, FSU-NHMFL
Abstract: Q64.00007 : Heat capacity of URu2-xOsxSi2 at low temperatures*
4:12 PM–4:24 PM
Presenter:
Dom L Kunwar
(Kent State University)
Authors:
Dom L Kunwar
(Kent State University)
Suman R Panday
(Kent State University)
Yuhang Deng
(University of California, San Diego)
Sheng Ran
(Washington University, St. Louis)
Ryan Baumbach
(National High Magnetic Field Laboratory)
Brian Maple
(University of California - San Diego)
Carmen C Almasan
(Kent State University)
an increase in osmium concentration. We also observe the increase in the values of the heat capacity at the critical temperature as well as a broadening
of the critical fluctuations region with an increase in x. We analyze the experimental data using the Haule-Kotliar model which, in particular, identifies the
'hidden order' transition in the parent material URu2Si2 as a transition to a state with nonzero hexadecapole moment. We will demonstrate that our experimental
results are consistent with the predictions of that model.
*The work at Kent State University was financially supported by the National Science Foundation under grants DMR-1904315 (D.L.K. and C.C.A.) and NSF-DMR-2002795 (S.R.P. and M.D.). Research at the University of California, San Diego was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under Grant No. DE-FG02-04ER46105 (single crystal growth), and by the National Science Foundation (NSF) under Grant No. DMR-1810310 (physical properties measurements). Research at the National High Magnetic Field Laboratory was supported by NSF Cooperative Agreement DMR-1157490, the State of Florida, and the DOE. R.E.B. was supported by the Center for Actinide Science and Technology (CAST), an Energy Frontier Research Center (EFRC) funded by the U.S. DOE, BES, under grant no. DE-SC0016568
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