4.6 Article

Lattice dynamical probe of charge order and antipolar bilayer stacking in LuFe2O4

Journal

PHYSICAL REVIEW B
Volume 82, Issue 1, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.014304

Keywords

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Funding

  1. Division of Materials Science and Engineering, Basic Energy Sciences, U.S. Department of Energy (UT and ORNL)
  2. State of Texas through the Texas Center for Superconductivity (UH)
  3. Initiative and Networking Fund of the Helmholtz Association of German Research Centers through the Helmholtz-University

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We investigated the infrared response of LuFe2O4 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 LuO2 layer mode is attributed to charge-rich/poor proximity effects and its temperature dependence reveals the antipolar nature of the W layer pattern.

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