Optical response of Pb quantum wells on Si(111)-<textbox>(6×6)textbox>-Au
- 作者：Viktor Hnatyuk ; Mirosł ; aw Stró ; ż ; ak
- 关键词：Lead ; Si(111)-(tyle="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVM-4RY8SJS-5&_mathId=mml5&_user=1067359&_cdi=5538&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=b8b66d586755122899c663
- 刊名：Physics Letters A
- 出版年：2008
- 期刊代码：57_03759601
- 类别：ph
- 出版时间：19 May 2008
- 卷：372
- 期：21
- 页码：3882-3887
- 文件大小：607 K
摘要
Ultrathin Pb films deposited on Si(111)-tyle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVM-4RY8SJS-5&_mathId=mml4&_user=1067359&_cdi=5538&_rdoc=27&_acct=C000050221&_version=1&_userid=10&md5=f524d9fa714836a992a481390231ae89" title="Click to view the MathML source" alt="Click to view the MathML source">(6×6)-Au at 105 K in ultrahigh vacuum (UHV) conditions were studied by means of differential reflectance (DR) spectroscopy. The optical signal from spectral range 0.25–0.60 eV has been measured in situ during Pb film growth. Base on DR data the imaginary part of the Pb dielectric function, the optical conductivity and the plasma frequency were determined. The scattering time of the electrons involved in optical transitions was obtained according to the Keller and Liu local field theory [O. Keller, A. Liu, Phys. Rev. B 49 (1994) 2072].