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

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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 ... continued below

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Jeffries, J R; Moore, K T; Butch, N P & Maple, M B May 19, 2010.

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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.

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7 p. (0.4 MB)

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PDF-file: 7 pages; size: 0.4 Mbytes

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  • Journal Name: Physical Review B, vol. 82, N/A, July 23, 2010, pp. 033103; Journal Volume: 82

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  • Report No.: LLNL-JRNL-432834
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1018007
  • Archival Resource Key: ark:/67531/metadc845893

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  • May 19, 2010

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  • May 19, 2016, 3:16 p.m.

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  • April 17, 2017, 1:04 p.m.

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Jeffries, J R; Moore, K T; Butch, N P & Maple, M B. The degree of 5f electron localization in URu2Si2: electron energy-loss spectroscopy and spin-orbit sum rule analysis, article, May 19, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc845893/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.