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Title: Probing 5f -state configurations in URu2Si2 with U LIII -edge resonant x-ray emission spectroscopy

Resonant x-ray emission spectroscopy (RXES) was employed at the U LIII absorption edge and the Lα1 emission line to explore the 5f occupancy, nf, and the degree of 5f-orbital delocalization in the hidden-order compound URu2Si2. By comparing to suitable reference materials such as UF4, UCd11, and α-U, we conclude that the 5f orbital in URu2Si2 is at least partially delocalized with nf=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 f2 ground state.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [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:
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; AC02-76SF00515
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)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1379516
Alternate Identifier(s):
OSTI ID: 1263696