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首页> 外文期刊>Physica, B. Condensed Matter >Change of exciton-phonon interaction in layered ferroelastic crystals (Cs3Bi2I9)
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Change of exciton-phonon interaction in layered ferroelastic crystals (Cs3Bi2I9)

机译:层状铁弹性晶体(Cs3Bi2I9)中激子-声子相互作用的变化

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摘要

The half-width of exciton absorption band (n = 1) of Cs3Bi2I9 layered ferroelastic crystals was studied carefully as function of temperature in the range from 5 to 300 K. For the first time, we have found a new physical effect: change of exciton-phonon interaction (from weak to strong) in the same sample as temperature increases. It was established that the temperature value T* = 150 K may be considered as characteristic one, below which a crystal loses the nature of layered substance. The effect is explained using a model that takes into account the reconstruction of the crystal lattice from non-layered to layered one. (C) 2008 Elsevier B.V. All rights reserved.
机译:对Cs3Bi2I9层状铁弹性晶体的激子吸收带的半峰宽(n = 1)进行了仔细研究,研究了温度在5至300 K范围内的变化。我们首次发现了一种新的物理效应:激子的变化温度升高时同一样品中的声子相互作用(从弱到强)。已经确定,温度值T * = 150K可以被认为是特征之一,在该温度以下,晶体失去了层状物质的性质。使用一种模型来解释这种效果,该模型考虑了晶格从非分层到分层的重构。 (C)2008 Elsevier B.V.保留所有权利。

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