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Spin-Orbit Mediated Interference in the Radiative and Nonradiative Channels of the La 4d Core Resonances

Source: Phys. Rev. Lett. 103, 137401 (2009); doi:10.1103/PhysRevLett.103.137401

Published 25 September 2009

PACS
  • 78.70.Dm
    X-ray absorption spectra (condensed matter)
  • 71.27.+a
    Strongly correlated electron systems; heavy fermions
  • 78.70.En
    X-ray emission spectra and fluorescence (condensed matter)
  • YEAR: 2009
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PUBLICATION DATA
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E. Suljoti,1,2 F. M. F. de Groot,2 M. Nagasono,1 P. Glatzel,3 F. Hennies,1 M. Deppe,1 A. Pietzsch,1 B. Sonntag,1 A. Föhlisch,1 and W. Wurth1
1Department of Physics, University of Hamburg, 22761 Hamburg, Germany
2Department of Chemistry, Utrecht University, 3584 CA Utrecht, The Netherlands
3European Synchrotron Radiation Facility (ESRF), 38043 Grenoble Cedex, France
Symmetrical fluorescence yield profiles and asymmetrical electron yield profiles of the preresonances at the La NIV,V x-ray absorption edge are experimentally observed in LaPO4 nanoparticles. Theoretical studies show that they are caused by interference effects. The spin-orbit interaction and the giant resonance produce symmetry entangled intermediate states that activate coherent scattering and alter the spectral distribution of the oscillator strength. The scattering amplitudes of the electron and fluorescence decays are further modified by the spin-orbit coupling in the final 5p5epsilonl and 5p54f1 states. ©2009 The American Physical Society
History: Received 3 July 2009; published 25 September 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e137401

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