PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS
Recent research demonstrates that graphene has unique properties and applications in many technological fields. This paper presents results calculated within random phase approximation at zero temperature for collective excitations, an important characteristic of materials, in a three-layer structur...
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| Format: | Article |
| Language: | English |
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Dalat University
2021-05-01
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| Series: | Tạp chí Khoa học Đại học Đà Lạt |
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| Online Access: | http://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/781 |
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| author | Nguyen Van Men Dong Thi Kim Phuong Vu Dong Duong |
| author_facet | Nguyen Van Men Dong Thi Kim Phuong Vu Dong Duong |
| author_sort | Nguyen Van Men |
| collection | DOAJ |
| description | Recent research demonstrates that graphene has unique properties and applications in many technological fields. This paper presents results calculated within random phase approximation at zero temperature for collective excitations, an important characteristic of materials, in a three-layer structure consisting of three bilayer graphene sheets in an inhomogeneous background dielectric. Numerical calculations show that one optical and two acoustic branches exist in the system. The optical branch becomes overdamped quickly while the two acoustic branches continue and disappear at single-particle excitation boundaries. The increase in carrier density in the layers significantly decreases the frequencies of plasmon modes. The inhomogeneity of the background dielectric decreases the frequency of the higher branches but increases that of the lower branch. The effects of interlayer separation on plasmon modes are similar to those in homogeneous systems. Our results may provide more information and contribute to improving the theory of graphene. |
| format | Article |
| id | doaj-art-2e3575bc9a814bd8956a7509c2d91dc1 |
| institution | Kabale University |
| issn | 0866-787X 0866-787X |
| language | English |
| publishDate | 2021-05-01 |
| publisher | Dalat University |
| record_format | Article |
| series | Tạp chí Khoa học Đại học Đà Lạt |
| spelling | doaj-art-2e3575bc9a814bd8956a7509c2d91dc12025-02-02T13:02:36ZengDalat UniversityTạp chí Khoa học Đại học Đà Lạt0866-787X0866-787X2021-05-0111110411410.37569/DalatUniversity.11.1.781(2021)387PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETSNguyen Van Men0Dong Thi Kim Phuong1Vu Dong Duong2Trường Đại học An Giang, Đại học Quốc gia TP Hồ Chí MinhTrường Đại học An Giang, Đại học Quốc gia TP Hồ Chí MinhTrường Đại học An Giang, Đại học Quốc gia TP Hồ Chí MinhRecent research demonstrates that graphene has unique properties and applications in many technological fields. This paper presents results calculated within random phase approximation at zero temperature for collective excitations, an important characteristic of materials, in a three-layer structure consisting of three bilayer graphene sheets in an inhomogeneous background dielectric. Numerical calculations show that one optical and two acoustic branches exist in the system. The optical branch becomes overdamped quickly while the two acoustic branches continue and disappear at single-particle excitation boundaries. The increase in carrier density in the layers significantly decreases the frequencies of plasmon modes. The inhomogeneity of the background dielectric decreases the frequency of the higher branches but increases that of the lower branch. The effects of interlayer separation on plasmon modes are similar to those in homogeneous systems. Our results may provide more information and contribute to improving the theory of graphene.http://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/781cấu trúc ba lớpđiện môi nền không đồng nhấtgraphene lớp képkích thích tập thể. |
| spellingShingle | Nguyen Van Men Dong Thi Kim Phuong Vu Dong Duong PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS Tạp chí Khoa học Đại học Đà Lạt cấu trúc ba lớp điện môi nền không đồng nhất graphene lớp kép kích thích tập thể. |
| title | PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS |
| title_full | PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS |
| title_fullStr | PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS |
| title_full_unstemmed | PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS |
| title_short | PLASMON MODES IN A MULTILAYER STRUCTURE WITH 3-BILAYER GRAPHENE SHEETS |
| title_sort | plasmon modes in a multilayer structure with 3 bilayer graphene sheets |
| topic | cấu trúc ba lớp điện môi nền không đồng nhất graphene lớp kép kích thích tập thể. |
| url | http://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/781 |
| work_keys_str_mv | AT nguyenvanmen plasmonmodesinamultilayerstructurewith3bilayergraphenesheets AT dongthikimphuong plasmonmodesinamultilayerstructurewith3bilayergraphenesheets AT vudongduong plasmonmodesinamultilayerstructurewith3bilayergraphenesheets |