Exciton absorption spectra of Cs2CdI4 and Rb2CdI4 ferroelastic solid solutions

被引：0
作者：
V. K. Miloslavskii
O. N. Yunakova
E. N. Kovalenko
机构：
[1] Kharkov National University,
[2] Kharkov National University of Radioelectronics,undefined
来源：
Optics and Spectroscopy | 2010年 / 109卷
关键词：
Spectral Position; Exciton State; Exciton Band; Interband Absorption; Coulomb Coupling;
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摘要：
The exciton absorption spectra of thin films of (Cs1 − xRbx)2CdI4 solid solutions have been investigated and the refractive index n(λ) in their transparency window in the concentration range of 0 ≤ x ≤ 1 has been measured. The exciton-band parameters and optical permittivity ɛ∞(x) have been found to linearly depend on the concentration. It is established that excitons are incorporated into the CdI2 sublattice of the solid solutions and belong to intermediate-coupling ones. The characteristics of excitons in ferroelastics are compared with the corresponding parameters for CdI2, RbI, and CsI, which are used as components to synthesize ternary compounds.
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页码：899 / 904
页数：5
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