Plasmon modes of double-layer graphene at finite temperature |
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| Institution: | 1. Department of Theoretical Physics, National University in Ho Chi Minh City, 227-Nguyen Van Cu Str., 5th District, Ho Chi Minh City, Vietnam;2. ICN2—Institut Catala de Nanociencia i Nanotecnologia, Campus UAB, 08193 Bellaterra (Barcelona), Spain;3. Department of Physics, Universitat Autonoma de Barcelona, Campus UAB, 08193 Bellaterra, Spain;1. Integrated Nanoscience Lab, Department of Material Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China;2. Integrated Nanoscience Lab, Department of Electronic and Information Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China;3. Key Lab of Micro-Optics and Photonic Technology of Heilongjiang Province, Harbin 150001, China;1. Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China;2. Hebei Chemical and Pharmaceutical Vocational Technology College, Shijiazhuang 050026, China;3. Faculty of Science, Tianjin University, Tianjin 300072, China;4. College of Physics Science & Information Engineering, Hebei Normal University, Shijiazhuang 050024, China;1. Department of Physics, Brown University Providence, RI, 02912, USA;2. School of Engineering, Brown University Providence, RI, 02912, USA;1. Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region 141700, Russian Federation;2. Institute for Spectroscopy, Russian Academy of Sciences, Fizicheskaya Str., 5 Troitsk, Moscow 142190, Russian Federation |
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| Abstract: | We calculate the dynamical dielectric function of doped double-layer graphene (DLG), made of two parallel graphene monolayers with carrier densities n1 and n2, and an interlayer separation of d at finite temperature. The results are used to find the dispersion of plasmon modes and loss functions of DLG for several interlayer separations and layer densities. We show that in the case of n2=0, the finite-temperature plasmon modes are dramatically different from the zero-temperature ones. |
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| Keywords: | Graphene Plasmon Collective excitations |
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