Electronic structure and polaronic excitation in FeVO{sub 4}
- Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201 (United States)
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996 (United States)
We investigated the electronic properties of FeVO{sub 4} films using optical, valence band x-ray photoelectron, and infrared spectroscopies. These studies show that FeVO{sub 4} is a direct bandgap system with a 2.7 eV gap with the Fermi level in the middle of the valence band maximum and conduction band minimum. A polaronic excitation is also observed in the middle infrared, indicating the importance of charge-lattice coupling in this multiferroic material. Fits to a model for the optical response of large polarons yield a binding energy of approximately 130 meV.
- OSTI ID:
- 22027766
- Journal Information:
- Applied Physics Letters, Vol. 99, Issue 14; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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