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Direct calculation of correlated absorption amplitudes for Nd:LiYF4
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
2003 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 68, no 19, 195105Article in journal (Refereed) Published
Abstract [en]

The correlation contribution to the transition amplitudes are investigated in the case of Nd:LiYF4. By using many-body perturbation theory, we derive expressions for an effective dipole operator. The operators considered are Omega(es)((1)dagger)DOmega(cf)((1)), Omega(cf)((1)dagger)DOmega(es)((1)), Omega(es-cf)((2)dagger)D, and DOmega(es-cf)((2)). In contrast to third-order spin-orbit and crystal-field modified amplitudes, inclusion of correlation modifies the standard second-order amplitudes significantly. A model cluster is optimized to experimental energy levels. This approach is then used to compute consistent odd and even crystal-field parameters needed for theoretical absorption spectra. As expected, it is observed that transitions occurring at small wavelengths are quite heavily influenced by correlation. The overall agreement between experimental and theoretical spectra below 600 nm (above 17000 cm(-1)) is greatly improved when correlation is taken into account.

Place, publisher, year, edition, pages
2003. Vol. 68, no 19, 195105
Keyword [en]
f-electrons, rare-earth, spectrum, atomic physics
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-1823DOI: 10.1103/PhysRevB.68.195105ISI: 000187163000039Scopus ID: 2-s2.0-0347664260Local ID: 584OAI: oai:DiVA.org:miun-1823DiVA: diva2:26855
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2016-10-05Bibliographically approved

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Åberg, DanielEdvardsson, SverkerEngholm, Magnus
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CiteExportLink to record
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Citation style
  • apa
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  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
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  • Other locale
More languages
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