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Multi-Atom Resonant Photoemission: A Method for Determining Near-Neighbor Atomic Identities and Bonding

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Science  31 Jul 1998:
Vol. 281, Issue 5377, pp. 679-683
DOI: 10.1126/science.281.5377.679

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Abstract

Measurements and theoretical calculations are reported for an interatomic multi-atom resonant photoemission (MARPE) effect that permits direct determination of near-neighbor atomic identities (atomic numbers). MARPE occurs when the photon energy is tuned to a core-level absorption edge of an atom neighboring the emitting atom, with the emitting level having a lower binding energy than the resonant level. Large peak-intensity enhancements of 33 to 105 percent and energy-integrated effects of 11 to 29 percent were seen in three metal oxides. MARPE should also be sensitive to bond distance, bonding type, and magnetic order, and be observable via the secondary processes of x-ray fluorescence and Auger decay.

  • * Permanent address: Departamento de CCIA y Departamento de Fisı́ca de Materiales, Universidad del Paı́s Vasco/EHU, 20080 San Sebastián, Spain.

  • To whom correspondence should be addressed. E-mail: fadley{at}physics.ucdavis.edu

  • Present address: MAXLAB, Lund University, S-22100 Lund, Sweden.

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