关于金属介电常数的..

192Vol19No2JOURNALOFSICHUANUNIVERSITYOF20064SCIENCE&ENGINEERINGNATURALSCIENCEEDITIONApr20061673-1549200602-0075-04εεεtieemmmωωγ−=++020Errrωωγtieω−=0rrrrrωωωieiti−=−=−0rrr202)(ωωω−=−=−tieirrr,,)(22000γωωωime−−=Er2005-9-291967-7620064tieimeωγωωω−−−=)(2200Er==rpee)(22002γωωωωimeeti−−−EE)(2202γωωωime−−=ω==eNZpPE)(2202γωωωimNZe−−EPeχε0=00)1(εχεεεer+==EP)(0εε−=)(22020γωωωεεimNZe−−+=)(122002γωωωεεimNZer−−+=ωγωγ…∑=−−+=KjjjjrifmNe12202])([1ωγωωεεZfKjj=∑=1ω)(])([1002012202ωγωεωγωωεεimeNfiifmNeKjjjjr−+−−+=∑=01fZfKjj−=∑=0γεωω→ε002012021ωγεωεεmeNfifmNeKjjjr++=∑=∑=+=′KjjjrfmNe12021ωεε0020ωγεεmeNfr=′′rrriεεε′′+′=rε′rεrε′′rεω→1977∞→′rεε∞ε∞→rεt∂∂+=×∇DjHEjσ=εEEHrriiiεωεωεσεωε000)(−=+′−=×∇ωεσεε0irr+′=020γσmeNf=σjEω→ε→∞ω→εrε′ωrε′ωωωλHz150106×≈ω3291/10mfNKjj≈∑=∑=+=′KjjjrfmNe12021ωεε10)106(1085.8101.9)106.1(101215123121929≈×××××××+=−−−εrε′jωωjωω202012021ωεωεεmeNffmNeKjjr−−=∑=01fZfKjj−=∑=2021ωεεmNZer−=022εωmNZeP=221ωωεPr−=02εωmNZeP=ωωεrnε=ωωεrnε=7820064328/105.8mNZ×=HzP16123121928101085.8101.9)106.1(105.8≈××××××=−−−ωtiemeωω−−=20ErωmeiEr=EirjωmNZeNZe2==jEπ0=⋅EjωDiscussiononDielectricConstantofMetalKUANGXiang-jun(SchoolofScience,SouthwestUniversityofScienceandTechnology,Mianyang621002,China)Abstract:Takingintoaccountofelectrondisplacementpolarizationandusingtheresonantbindingelectronmodel,theexpressionofrelativelydielectricconstantofmetalisderived,thentwoimportantcaseoflowfrequencyandhighfrequencyarediscussed,atlastaexpalanationondielectricconstantofmetalisgiven.Ourworkcanhelpunderstandingdielectricconstantofmetalmoredeeply.Keywords:electrondisplacementpolarization;resonantbindingelectronmodel;dielectricconstantofmetal