Resonant soft x-ray fluorescence studies of novel materials
- Lawrence Livermore National Lab., CA (United States)
- National Inst. of Standards and Technology, Gaithersburg, MD (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- IBM Research Div., Yorktown Heights, NY (United States). Thomas J. Watson Research Center
- Tulane Univ., New Orleans, LA (United States)
- Lawrence Berkeley Lab., CA (United States)
The authors are using resonant soft x-ray fluorescence at the Advanced Light Source to probe the electronic and geometric structure of novel materials. In the resonant process, a core electron is excited by a photon whose energy is near the core binding energy. In this energy regime the absorption and emission processes are coupled, and this coupling manifests itself in several ways. In boron nitride (BN), the resonant emission spectra reflect the influence of a ``spectator`` electron in an unoccupied excitonic state. The resonant emission can be used to distinguish between the various bulk phases of BN, and can also be used to probe the electronic structure of a monolayer of BN buried in a bulk environment, where it is inaccessible to electron spectroscopies. For highly-oriented pyrolytic graphite (HOPG) a coherent absorption-emission process takes place in the resonant regime, whereby crystalline momentum is conserved between the core excited electron and the valence hole which remains after emission.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States); Oak Ridge National Lab., TN (United States); Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States); Science Alliance Center of Excellence (United States)
- DOE Contract Number:
- W-7405-ENG-48; AC05-84OR21400; AC03-76SF00098
- OSTI ID:
- 81067
- Report Number(s):
- UCRL-JC--120259; CONF-941144--161; ON: DE95013462; CNN: Grant DMR-9017996; Grant DMR-9017997
- Country of Publication:
- United States
- Language:
- English
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