Absence of X-point band overlap in divalent hexaborides and variability of the surface chemical potential

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Angle-resolved photoemission measurements of divalent hexaborides reveals a >1 eV X-point gap between the valence and conduction bands, in contradiction to the band overlap assumed in several models of their novel ferromagnetism. While the global ARPES band structure and gap size observed are consistent with the results of bulk-sensitive soft x-ray absorption and emission boron K-edge spectroscopy, the surface-sensitive photoemission measurements also show a variation with cation, surface and time of the position of the surface chemical potential in the band structure.

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Denlinger, Jonathan D.; Gweon, Gey-Hong; Mo, Sung-Kwan; Allen, James W.; Sarrao, John L.; Bianchi, Adrian D. et al. November 4, 2001.

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Angle-resolved photoemission measurements of divalent hexaborides reveals a >1 eV X-point gap between the valence and conduction bands, in contradiction to the band overlap assumed in several models of their novel ferromagnetism. While the global ARPES band structure and gap size observed are consistent with the results of bulk-sensitive soft x-ray absorption and emission boron K-edge spectroscopy, the surface-sensitive photoemission measurements also show a variation with cation, surface and time of the position of the surface chemical potential in the band structure.

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INIS; OSTI as DE00797870

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  • International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (ORBITAL 2001), Sendai (JP), 09/11/2001--09/14/2001

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  • Report No.: LBNL--50851
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 797870
  • Archival Resource Key: ark:/67531/metadc734201

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  • November 4, 2001

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  • Oct. 19, 2015, 7:39 p.m.

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  • April 1, 2016, 8:30 p.m.

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Denlinger, Jonathan D.; Gweon, Gey-Hong; Mo, Sung-Kwan; Allen, James W.; Sarrao, John L.; Bianchi, Adrian D. et al. Absence of X-point band overlap in divalent hexaborides and variability of the surface chemical potential, article, November 4, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc734201/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.