The degree of 5f electron localization in URu2Si2: electron energy-loss spectroscopy and spin-orbit sum rule analysis

Journal Article · Wed May 19 04:00:00 EDT 2010 · Physical Review B, vol. 82, N/A, July 23, 2010, pp. 033103

OSTI ID:1018007

Jeffries, J R; Moore, K T; Butch, N P; Maple, M B

We examine the degree of 5f electron localization in URu{sub 2}Si{sub 2} using spin-orbit sum rule analysis of the U N{sub 4,5} (4d {yields} 5f) edge. When compared to {alpha}-U metal, US, USe, and UTe, which have increasing localization of the 5f states, we find that the 5f states of URu{sub 2}Si{sub 2} are more localized, although not entirely. Spin-orbit analysis shows that intermediate coupling is the correct angular momentum coupling mechanism for URu{sub 2}Si{sub 2} when the 5f electron count is between 2.6 and 2.8. These results have direct ramifications for theoretical assessment of the hidden order state of URu{sub 2}Si{sub 2}, where the degree of localization of the 5f electrons and their contribution to the Fermi surface are critical.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 1018007
• Report Number(s): LLNL-JRNL-432834
• Journal Information: Physical Review B, vol. 82, N/A, July 23, 2010, pp. 033103, Journal Name: Physical Review B, vol. 82, N/A, July 23, 2010, pp. 033103 Vol. 82
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ELECTRONS
ENERGY-LOSS SPECTROSCOPY
FERMI LEVEL
INTERMEDIATE COUPLING
SUM RULES