Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3118576
Keywords
bismuth compounds; ferroelectric materials; ferroelectric transitions; magnons; multiferroics; Neel temperature; phonon-magnon interactions; phonons; Raman spectra
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Funding
- National Science Foundation [DMR-0512165, DMR-0507146, DMR-0820404, DMR-0602986, DMR-0520513, DMR-0213623, DMR-0520471]
- U.S. Department of Energy [DE-AC02-05CH11231, DE-FG02-01ER45885]
- DOE/BES [DE-AC02-06CH11357]
- U.S. Department of Energy (DOE) [DE-FG02-01ER45885] Funding Source: U.S. Department of Energy (DOE)
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Spin-charge-lattice coupling mediated by multimagnon processes is demonstrated in multiferroic BiFeO3. Experimental evidence of two- and three-magnon excitations as well as multimagnon coupling at electronic energy scales and high temperatures are reported. Temperature dependent Raman experiments show up to five resonant enhancements of the two-magnon excitation below the Neel temperature. These are shown to be collective interactions between on-site Fe d-d electronic resonance, phonons, and multimagnons.
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