کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1858945 1530555 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transverse intrinsic localized modes in monatomic chain and in graphene
ترجمه فارسی عنوان
حالت های متداول داخلی عرضی در زنجیره واحد و در گرافن
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
چکیده انگلیسی


• In a stretched monatomic chain, long-living nonlinear transverse localized modes may exist.
• Transverse vibrations of a chain slowly decay due to creation of longitudinal phonons.
• Lifetime of transverse vibrations of a chain may exceed billion periods of vibrations.
• In stretched graphene, long-living out-of-plain localized vibrations may exist.

In this paper an analytical and numerical study of anharmonic vibrations of monatomic chain and graphene in transverse (perpendicular) with respect to the chain/plane direction is presented. Due to the lack of odd anharmonicities and presence of hard quartic anharmonicity for displacements in this direction, there may exist localized anharmonic transverse modes with the frequencies above the spectrum of the corresponding phonons. Although these frequencies are in resonance with longitudinal (chain) or in-plane (graphene) phonons, the modes can decay only due to a weak anharmonic process. Therefore the lifetime of these vibrations may be very long. E.g. in the chain, according to our theoretical and numerical calculations it may exceed 1010 periods. We call these vibrations as transverse intrinsic localized modes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 380, Issues 9–10, 6 March 2016, Pages 1075–1081
نویسندگان
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