Site correlation effects in the dynamics of iron impurities Fe2+Fe3+ and antisite defects NbLi4+NbLi5+ after a short-pulse excitation in LiNbO3

J. Carnicero, M. Carrascosa, G. García, and F. Agulló-López
Phys. Rev. B 72, 245108 – Published 12 December 2005

Abstract

The correlation effects between excitation and trapping sites after light excitation in a Li-deficient Fe-doped LiNbO3 crystal have been quantitatively analyzed. They appear as a direct consequence of the thermally activated random transport (hopping) of electrons (free polarons) by using a Monte Carlo approach. The physical consequences of those effects, not present in usual coherent band-transport analyses, are explored and discussed in the light of available experiment. In particular, nonexponential decay kinetics for the evolution of electrons trapped at antisites (small polarons) are predicted.

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  • Received 15 March 2005

DOI:https://doi.org/10.1103/PhysRevB.72.245108

©2005 American Physical Society

Authors & Affiliations

J. Carnicero1, M. Carrascosa1, G. García2, and F. Agulló-López1,2

  • 1Departamento de Física de Materiales C-IV, Universidad Autónoma de Madrid, 28049 Madrid, Spain
  • 2Centro de Microanálisis de Materiales (CMAM), Universidad Autónoma de Madrid, 28049 Madrid, Spain

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Vol. 72, Iss. 24 — 15 December 2005

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