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Title: Lattice Dynamical Probe of Charge Order and Antipolar Bilayer Stacking in LuFe2O4

Journal Article · · Physical Review B
 [1];  [2];  [1];  [3];  [3];  [2];  [4];  [1]
  1. University of Tennessee, Knoxville (UTK)
  2. Institut fur Festkorperforschung
  3. ORNL
  4. University of Houston, Houston

We investigated the infrared response of LuFe{sub 2}O{sub 4} through the series of charge, magnetic, and structural transitions. All vibrational modes couple strongly to the charge order, whereas the LuO zone-folding modes are also sensitive to magnetic order and structural distortion. The dramatic splitting of the LuO{sub 2} layer mode is attributed to charge-rich/poor proximity effects and its temperature dependence reveals the antipolar nature of the W layer pattern.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
DE-AC05-00OR22725
OSTI ID:
986851
Journal Information:
Physical Review B, Vol. 82, Issue 1; ISSN 1098-0121
Country of Publication:
United States
Language:
English