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Investigation of the Atomic Structure of Ge-Sb-Se Chalcogenide Glasses
المؤلفون المشاركون
Fabian, M.
Dulgheru, N.
Antonova, K.
Szekeres, A.
Gartner, M.
المصدر
Advances in Condensed Matter Physics
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-11، 11ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-12-02
دولة النشر
مصر
عدد الصفحات
11
التخصصات الرئيسية
الملخص EN
Glasses with composition of GexSb40-xSe60 (x= 40, 35, 32, 27, 20, 15 at.
%) have been synthesized.
Neutron and X-ray diffraction techniques were used to study the atomic glassy structure, and Reverse Monte Carlo (RMC) simulations were applied to model the 3-dimensional atomic configurations and thorough mapping of the atomic parameters, such as first and second neighbour distances, coordination numbers, and bond-angle distributions.
The results are explained with formation of GeSe4 and SbSe3 structural units, which correlate with the Ge/Sb ratio.
For all the studied compositions, the Ge-Se, Sb-Se, Ge-Ge, and Se-Se bonds are significant.
RMC simulations reveal the presence of Ge-Sb and Sb-Sb bonds, being dependent on Ge/Sb ratio.
All atomic compositions satisfy formal valence requirements, i.e., Ge is fourfold coordinated, Sb is threefold coordinated, and Se is twofold coordinated.
By increasing the Sb content, both the Se-Ge-Se bonds angle of 107±3° and Se-Sb-Se bonds angle of 118±3° decrease, respectively, indicating distortion of the structural units.
Far infrared Fourier Transform spectroscopic measurements conducted in the range of 50-450 cm-1 at oblique (75°) incidence radiation have revealed clear dependences of the IR band’s shift and intensity on the glassy composition, showing features around x=27 at.% supporting the topological phase transition to a stable rigid network consisting mainly of SbSe3 pyramidal and GeSe4 tetrahedral clusters.
These results are in agreement with the Reverse Monte Carlo models, which define the Ge and Sb environment.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Fabian, M.& Dulgheru, N.& Antonova, K.& Szekeres, A.& Gartner, M.. 2018. Investigation of the Atomic Structure of Ge-Sb-Se Chalcogenide Glasses. Advances in Condensed Matter Physics،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1117301
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Fabian, M.…[et al.]. Investigation of the Atomic Structure of Ge-Sb-Se Chalcogenide Glasses. Advances in Condensed Matter Physics No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1117301
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Fabian, M.& Dulgheru, N.& Antonova, K.& Szekeres, A.& Gartner, M.. Investigation of the Atomic Structure of Ge-Sb-Se Chalcogenide Glasses. Advances in Condensed Matter Physics. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1117301
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1117301
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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