کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5450226 1512861 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A structural mechanics approach for the phonon dispersion analysis of graphene
ترجمه فارسی عنوان
رویکرد مکانیک ساختاری برای تجزیه پراکندگی فونون گرافن
کلمات کلیدی
برگ گرافن، همبستگی انرژی، قاب فضای پرتو تراس، رابطه پراکندگی فونون، نانوساختار کم حجم،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
A molecular structural mechanics model for the numerical simulation of phonon dispersion relations of graphene is developed by relating the C-C bond molecular potential energy to the strain energy of the equivalent beam-truss space frame. With the stiffness matrix known and further based on the periodic structure characteristics, the Bloch theorem is introduced to develop the dispersion relation of graphene sheet. Being different from the existing structural mechanics model, interactions between the fourth-nearest neighbor atoms are further simulated with beam elements to compensate the reduced stretching stiffness, where as a result not only the dispersion relations in the low frequency field are accurately achieved, but results in the high frequency field are also reasonably obtained. This work is expected to provide new opportunities for the dynamic properties analysis of graphene and future application in the engineering sector.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 88, April 2017, Pages 252-258
نویسندگان
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