Dipole polarizabilities of germanium clusters |
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| Institution: | 1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, PR China;2. Department of Chemistry, Nanjing University, Nanjing 210093, PR China;3. Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;1. Department of Particle Physics and Astrophysics, Weizmann Institute of Science, 76100 Rehovot, Israel;2. LIBPhys, Department of Physics, University of Coimbra, RuaLarga, PT3004-516 Coimbra, Portugal;3. I3N, Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal;4. CERN, Meyrin, Switzerland;1. Budker Institute of Nuclear Physics SB RAS, Lavrentiev avenue 11, 630090 Novosibirsk, Russia;2. Novosibirsk State University, Pirogov street 2, 630090 Novosibirsk, Russia;1. Kuang-Chi Institute of Advanced Technology, Shenzhen 518057, China;2. A.A. Galkin Donetsk Institute for Physics and Engineering of National Academy of Sciences, 83114 Donetsk, Ukraine |
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| Abstract: | Dipole polarizabilities of Gen clusters with 2–25 atoms are calculated using finite field (FF) method within density functional theory. The dipole moments and polarizabilities of clusters are sensitively dependent on the cluster geometries and electronic structures. The clusters with low symmetry and large HOMO–LUMO gap prefer to large dipole moments. The polarizabilities of the Gen clusters increase rapidly in the size range of 2–5 atoms and then fluctuate around the bulk value. The larger HOMO–LUMO gap may lead to smaller polarizability. As compared with the compact structure and diamond structure, the prolate cluster structure corresponds to a larger polarizability. |
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