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Title: Probing 5 f -state configurations in URu 2 Si 2 with U L III -edge resonant x-ray emission spectroscopy

Resonant x-ray emission spectroscopy (RXES) was employed at the U LIII absorption edge and the L α1 emission line to explore the 5f occupancy, nf, and the degree of 5f-orbital delocalization in the hidden-order compound URu 2Si 2. By comparing to suitable reference materials such as UF 4, UCd 11, and α-U, we conclude that the 5f orbital in URu 2Si 2 is at least partially delocalized with n f=2.87±0.08, and does not change with temperature down to 10 K within the estimated error. These results place further constraints on theoretical explanations of the hidden order, especially those requiring a localized f 2 ground state.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ; ORCiD logo [5] ;  [6] ;  [6] ;  [7]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Australian National Univ., Canberra (Australia)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Wisconsin-Oshkosh, WI (United States)
  4. National High Magnetic Field Lab., Tallahassee, FL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States); Center for High Pressure Science & Technology Advanced Research, Shanghai (People's Republic of China)
Publication Date:
Report Number(s):
LA-UR-17-24462
Journal ID: ISSN 2469-9950; PRBMDO; ark:/13030/qt2xm6690f; TRN: US1702696
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; AC02-76SF00515; AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Material Science
OSTI Identifier:
1379516
Alternate Identifier(s):
OSTI ID: 1263696; OSTI ID: 1407893