Multiphonon Instabilities of an Electron-Hole Pair across the Band Gap
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概要
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With the use of a simple adiabatic model in which an electron-hole pair can be an-nihilated across the band gap under local lattice distortion, we compared the radiativeand nonradiative processes, and classified the relaxed excited state into five types con-sidering their roles as recombination channels. They are: the free exciton (F), the selftrapped exciton (S. or S..) which was immune from or survived the dynamicnonradiative annihilation on its way from F, the nonluminescent Frenkel defect (S...),and the unstable state (U), corresponding to the increasing ratio of the exciton latticerelaxation energy to the band gap. The results are not only consistent with the generaltrend of available experiments on a variety of materials, but will also be useful for theprediction of relevant features of known and unknown materials.multiphonon instability, electron hole pair, exciton, band gap, lattice relaxa-lion, self-trapping, nonradiative annihilation, luminescence, lattice defect, struc-tural phase transition
- 社団法人日本物理学会の論文
- 1989-08-15
著者
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TOYOZAWA Yutaka
Department of Physics,Chuo University
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Toyozawa Yutaka
Department Of Applied Physics Tokyo University
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Toyozawa Yutaka
The Institute For Solid State Physics The University Of Tokyo Roppongi Minato-ku
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