Self-Trapping in Mixed Crystal : Clustering, Dimensionality, Percolation
スポンサーリンク
概要
- 論文の詳細を見る
Self-trapping of a Frenkel exciton in binary mixed crystal A.B. , with excita-tion energy difference A=e. -e. and exciton-ph.onon coupling constant g, isstudied. Imrurit>r-assisted self-trarrinu is rossible through cooperation of A andg even when neither of them alone is enough for localization. In this situation,one expects amalgamated absorption spectrtun representing unrelaxed extendedexciton and Stokes-shifted broad emission band representing relaxed localizedexciton. We study whether relaxed exciton is localized (S-state) at a particularsite of, or extended (B-state) tlxroughout, the J-cltuster of various sizes, and howsuch cluster state changes, as c increases, into free (F) state extended throughoutthe crystal. The results are compared with recent experiments on TlBr.C1.-,.Sudden appearance of edge emission (due to F) at c-4.3, at the cost of broadband (due to S and B), is ascribed to the combined effect of size-dependentdiscontinuity of S-B transition in Br-clusters and their percolation.
- 社団法人日本物理学会の論文
- 1979-02-15
著者
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Toyozawa Yutaka
The Institute For Solid State Physics The University Of Tokyo
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Shinozuka Y
Yamaguchi Univ. Ube
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Shinozuka Yuzo
The Institute For Solid State Physics The University Of Tokyo
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Toyozawa Yutaka
The Institute For Solid State Physics The University Of Tokyo Roppongi Minato-ku
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