Investigation of temperature dependent optical modes in Ge_xAs_{35 − x}Se₆₅ thin films: Structure specific Raman, FIR and optical absorption spectroscopy

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• 作者：Pritam Khan^a ; Arinjoy Bhattacharya^a ; Abin Joshy^a ; Vasant Sathe^b ; Uday Deshpande^b ; K.V. Adarsh^a ; ^{adarsh@iiserb.ac.in}
• 关键词：Thin films ; Raman spectroscopy and scattering ; Infrared spectroscopy (IR) ; Optical materials ; Chalcogenides ; Amorphous materials
• 刊名：Thin Solid Films
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：621
• 期：Complete
• 页码：76-83
• 全文大小：1641 K
• 卷排序：621

文摘

Composition and temperature dependent structural characterization in GexAs35 − xSe65 thin films Temperature mediated structural rearrangements―softening of AsSe3/2 pyramidal and Se clusters GeSe4/2 tetrahedra is structurally rigid, does not exhibit peak shift against temperature variation. Our results provide thermally and compositionally tunable optical absorption spectra. New insights on structural units with both Raman and FIR spectroscopy