Published June 2024 | Version v1
Journal article Metadata-only

Charge disproportionation for trimerization and tetramerization in spinel-type AlV2O4

Creators

  • 1. Waseda University, Department of Applied Physics, Tokyo (Japan)
  • 2. Tokyo University of Science, Department of Applied Physics, Tokyo (Japan)
  • 3. Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo (Japan)
  • 4. Nagoya University, Institute of Materials and Systems for Sustainability (IMaSS), Nagoya, Aichi (Japan)
  • 5. Waseda University, Department of Physics, Tokyo (Japan)

Description

The electronic structure of spinel-type AlV2O4 is investigated using bulk-sensitive hard x-ray photoemission spectroscopy (HAXPES). The main and shoulder peaks of the V 2p3/2 core-level HAXPES spectra indicate charge disproportionation between V2+ and V3+, consistent with the average V valence of +2.5. The estimated V2+/V3+ ratio is compatible with the formation of V trimers and tetramers in AlV2O4, providing a hint to develop a model for charge and orbital orderings in the V pyrochlore lattice. We propose that V2+ tetramers and V3+ trimers on the pyrochlore lattice are naturally explained by an orbitally induced Peierls mechanism. (author)

Availability note (English)

Available from DOI: https://doi.org/10.7566/JPSJ.93.074709

Additional details

Identifiers

DOI
10.7566/JPSJ.93.074709;

Publishing Information

Journal Title
Journal of the Physical Society of Japan (Online)
Journal Volume
93
Journal Issue
7
Journal Page Range
p. 074709.1-074709.6
ISSN
1347-4073

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
56002799
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BINDING ENERGY; CHARGE TRANSPORT; DENSITY FUNCTIONAL METHOD; ELECTRICAL INSULATORS; ELECTRONIC STRUCTURE; FERMI LEVEL; PHASE TRANSFORMATIONS; PHOTOIONIZATION; VANADIUM IONS; VANADIUM OXIDES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY
Descriptors DEC
CALCULATION METHODS; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; ELECTRICAL EQUIPMENT; ELECTRON SPECTROSCOPY; ENERGY; ENERGY LEVELS; EQUIPMENT; IONIZATION; IONS; OXIDES; OXYGEN COMPOUNDS; PHOTOELECTRON SPECTROSCOPY; SCATTERING; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS; VARIATIONAL METHODS

Optional Information

Notes
40 refs., 6 figs.