High-order Dy multipole motifs observed in DyB2C2 with resonant soft x-ray Bragg diffraction

A. M. Mulders, U. Staub, V. Scagnoli, S. W. Lovesey, E. Balcar, T. Nakamura, A. Kikkawa, G. Van Der Laan, J. M. Tonnerre

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22 Citations (Scopus)

Abstract

Resonant soft x-ray Bragg diffraction at the Dy M4,5 edges has been exploited to study Dy multipole motifs in DyB2C2. Our results are explained by introducing the intra-atomic quadrupolar interaction between the core 3d and valence 4f shell. This allows us to determine for the first time higher-order multipole moments of dysprosium 4f electrons and to draw their precise charge density. The Dy hexadecapole and hexacontatetrapole moment have been estimated at -20% and +30% of the quadrupolar moment, respectively. No evidence for the lock-in of the orbitals at TN has been observed, in contrast to earlier suggestions. The multipolar interaction and the structural transition cooperate along c but they compete in the basal plane, explaining the canted structure along [110].

Original languageEnglish
Article number012
Pages (from-to)11195-11202
Number of pages8
JournalJournal of Physics Condensed Matter
Volume18
Issue number49
DOIs
Publication statusPublished - 2006 Dec 13
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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