Optical properties of PbTe0.95S0.05 single crystal at different temperatures: far – infrared study

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Optical properties of PbTe0.95S0.05 single crystal at different temperatures: far – infrared study

机译：PbTe0.95S0.05单晶在不同温度下的光学性质：远红外研究

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Far-infraredspectroscopyoverawidetemperaturerangewasusedtoinvestigatevibrationpropertiesofPbTe0.95S0.05singlecrystal.Theanalysisofthefarinfraredspectrawasmadebyfittingprocedurebasedonthemodelofcoupledoscillators.Namely,weuseddielectricfunctionthatinadvancetakesintoaccounttheexistenceofplasmon-twophononinteraction.AsaresultofthebestfitweobtainedthreefrequenciesofcoupledmodesandthanwecalculatedvaluesfortwoLOmodesandplasmafrequencies(omega;P).Weobtainedaverygoodagreementbetweentheresultobtainedasabestfitfromexperimentalspectraandtheoreticalprediction.WehavefoundthatphononsinPbTe0.95S0.05showthetwonbsp;-nbsp;modebehavior.

机译：远infraredspectroscopyoverawidetemperaturerangewasusedtoinvestigatevibrationpropertiesofPbTe0.95S0.05singlecrystal.Theanalysisofthefarinfraredspectrawasmadebyfittingprocedurebasedonthemodelofcoupledoscillators.Namely，weuseddielectricfunctionthatinadvancetakesintoaccounttheexistenceofplasmon-twophononinteraction.AsaresultofthebestfitweobtainedthreefrequenciesofcoupledmodesandthanwecalculatedvaluesfortwoLOmodesandplasmafrequencies（欧米加; P）.Weobtainedaverygoodagreementbetweentheresultobtainedasabestfitfromexperimentalspectraandtheoreticalprediction.WehavefoundthatphononsinPbTe0.95S0.05showthetwonbsp; -nbsp; modebehavior。

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《Optoelectronics and Advanced Materials-Rapid Communications》 |2012年第2012期|共页
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Optical properties of PbTe0.95S0.05 single crystal at different temperatures: far – infrared study

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