Absorption cross sections and number densities of electron and hole polarons in congruently melting LiNbO3

C. Merschjann, B. Schoke, D. Conradi, M. Imlau, G. Corradi, K. Polgr

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Abstract

The number densities and absorption cross sections of both optically generated and reduction-induced small electron and hole polarons in LiNbO 3 are determined by means of time-resolved pump-multiprobe spectroscopy. The data are obtained for free (NbNb4+) and bound (NbLi4+) electron polarons, bound Nb Li4+:NbNb4+ electron bipolarons, and bound O- hole polarons. The peak absorption cross sections are in the range of σpol≈(4-14) × 10-22m 2, comparable to that for Fe2+. In all cases the ratio of occupied to unoccupied polaronic sites is less than 10-2.

Original languageEnglish
Article number015906
JournalJournal of Physics Condensed Matter
Volume21
Issue number1
DOIs
Publication statusPublished - Apr 9 2009

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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