کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1664343 1518014 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The strain dependence of Ge1 − xsnx (x = 0.083) Raman shift
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
The strain dependence of Ge1 − xsnx (x = 0.083) Raman shift
چکیده انگلیسی


• We report an investigation of strain-dependent Raman shift of Ge0.917Sn0.083.
• The strains of the films are modulated by ex-situ rapid thermal annealing.
• The amount of strain is determined by X-ray diffraction.
• The strain-dependent coefficient is b = − 299.3 cm− 1.

We report an investigation of strain-dependent Raman frequency shift in Ge0.917Sn0.083 epilayer where the Sn composition is near the indirect-to-direct band gap transition point. The strain is modulated by ex-situ rapid thermal annealing and the amount of strain relaxation is determined by X-ray diffraction measurement. The results show that the Raman shift of Ge–Ge longitudinal optical phonon is linearly dependent on the in-plane strain of the GeSn layers with a coefficient b = − 299.3 cm− 1. Such a relationship enables characterization of GeSn epilayers using the readily accessible Raman spectroscopy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 593, 30 October 2015, Pages 40–43
نویسندگان
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