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CLASSICAL SIZE EFFECTS ON DIELECTRIC FUNCTION OF METAL CYLINDER WITH INFINITE LENGTH |
ZHAO Weiren; LIU Degi; HUANG Rongfang; WEN Lishi(Metal Research Institute; The Chinese Academy of Sciences; Shenyang 110015)Correspondent: WEN Lishi; professor Tel: (024)23843531-55250 Fax: (024)23891320 |
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Cite this article:
ZHAO Weiren; LIU Degi; HUANG Rongfang; WEN Lishi(Metal Research Institute; The Chinese Academy of Sciences; Shenyang 110015)Correspondent: WEN Lishi; professor Tel: (024)23843531-55250 Fax: (024)23891320. CLASSICAL SIZE EFFECTS ON DIELECTRIC FUNCTION OF METAL CYLINDER WITH INFINITE LENGTH. Acta Metall Sin, 1998, 34(8): 819-823.
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Abstract Dielectric function (DF) of metal cylinder with infinite length has been calculated using nonequilibrium statistical mechanics. The results show that the intrinsic DF of metal will be changed if the cylinder's surface is inelastic for electron scattering. As the radius of the cylinder decreases to the range of the electron mean free path (MFP), DF deviates from the bulk value and depends on the position in the cylinder gradually. The relation between DF and the position is complicated except when the radius is much smaller than MFP. Size effects may increase both real part ε' and imaginary part ε'' of DF and raise effectively the absolute ratio value of ε" to ε'.The radial distribution of oscillatory form of DF is discovered in the range of high frequence due to size effects.
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Received: 18 August 1998
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