Электронный архив

Theoretical studies of electron-vibrational 4fN-4fN-15d spectra in LiYF4:RE3+ crystals

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dc.contributor.author Malkin B.
dc.contributor.author Solovyev O.
dc.contributor.author Malishev A.
dc.contributor.author Saikin S.
dc.date.accessioned 2018-09-18T20:05:10Z
dc.date.available 2018-09-18T20:05:10Z
dc.date.issued 2007
dc.identifier.issn 0022-2313
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136364
dc.description.abstract The UV and VUV inter-configuration 4fN-4fN-15d spectra of rare-earth ions in insulators consist of broad electron-vibrational bands which sometimes have a resolved fine structure. In the present work, the low-temperature absorption band shapes of the impurity Ce3+, Pr3+ and Nd3+ ions in LiYF4 crystals have been simulated in the framework of the microscopic theory operating with the real phonon spectrum of the host crystal lattice. The energy levels and wave functions of the ground (4fN) and excited (4fN-15d) electronic configurations of rare-earth ions were obtained from the numerical diagonalization of the Hamiltonian containing energies of electrostatic Coulomb and exchange interactions between electrons, spin-orbit interactions and the crystal field interaction. Crystal field parameters and electron-phonon coupling constants were treated in the framework of the exchange charge model. Form-functions of the spectral bands proportional to the calculated integral intensities of electric dipole transitions are obtained as a sum of convolutions of spectral densities of multiphonon correlation functions and form-functions of zero-phonon lines with the widths determined by distributions of random lattice strains and non-radiative transition probabilities. The calculated values of the Huang-Rhys parameters of crystal field states in mixed 4fN-15d configurations vary in the range from 0.1 to 15 and correspond to intermediate or strong electron-phonon interactions. Results of simulations of the spectral envelopes agree satisfactorily with the experimental data available from the literature. © 2006 Elsevier B.V. All rights reserved.
dc.relation.ispartofseries Journal of Luminescence
dc.subject 4f-5d spectra
dc.subject electron-phonon interaction
dc.subject LiYF4
dc.title Theoretical studies of electron-vibrational 4fN-4fN-15d spectra in LiYF4:RE3+ crystals
dc.type Article
dc.relation.ispartofseries-issue 1-2
dc.relation.ispartofseries-volume 125
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 175
dc.source.id SCOPUS00222313-2007-125-12-SID33847300404


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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