Self-Trapping of Excitons Beginning With Tunneling Nucleation
スポンサーリンク
概要
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The rate of self-trapping (ST) is calculated, considering that ST begins withquantum-mechanical tunneling of a free exciton to a state of nucleation lesslocalized than the relaxed self-trapped one. Three cases appear depending onthe site-diagonal and off-diagonal exciton-phonon interaction energies .5. and.5. relative to the half width B of the exciton band. When S./B20.21, ST throughthe nucleation state of two-center type predominates. When S./13<0.21 and S./73<1,25, only ST through. that of one-centcr type occurs. When S./B':.0.21 butS./B>, 1.25, the latter channel predominates at low temperatures but it is over-come by the former one with increasing temperature. Alkali ha[ides exceptiodides are classified into the first case, Rb[ into the second one, and Kl into thethird one. The so called E. luminescence observed only in alkali iodides should beemitted from a still unknown self-trapped state of one-center type.
- 社団法人日本物理学会の論文
- 1984-10-15
著者
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Sumi Hitoshi
Institute of Materials Science, Univ. of Tsukuba
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Sumi Hitoshi
Institute Of Materials Science University Of Tsukuba
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