Basic Assumptions of The Drude Model 作为固体物理的起点,Drude model 用于解释金属的导电行为。 电子气体模型 金属中的价电子被看作经典气体,每个价电子都是一个可分辨的刚性球,带负电;除去价电子之外的原子核和内层电子组成的金属离子带正电,且质量大得多,不可移动。 先来计算一下这种电子气模型的基本物理量...
在Drude的时代,电子平均速度很自然地由能量均分定理\frac{1}{2}mv_0^2=\frac{3}{2}k_BT得出,也就是室温下大概在10^7cm/s 量级,这样两个相乘得到的平均自由程是 1 到 10\mathring{A}:刚好和离子之间的距离对应,因此看起来和Drude的电子和离子碰撞的假设完全相符。 然而,之后在 Chap2 会看到用经典方...
The Drude Theory of MetalsKarl, PaulDrude, LudwigLaw, Lorentz Force
This chapter presents the notes of the lecture on the electron theory of metals held in the University of Copenhagen in the spring of 1914. The chapter discusses metallic conduction in contrast to electrolytic conduction and the electron theory. The differences among the treatments, manners of ...
Sources of Drugs Drugs are obtained from many sources. Many inorganic materials, such as metals, are chemotherapeutic; hormones, alkaloids, vaccines, and antibiotics come from living organisms; and other drugs are synthetic or semisynthetic. Synthetics are often more effective and less toxic than the...
The formation of a new type of laser-induced periodic surface structures using a femtosecond pulsed laser is studied on the basis of the Sipe-Drude theory ... JL Déziel,J Dumont,D Gagnon,... - 《Journal of Optics》 被引量: 3发表: 2015年 Formation of micron and submicron structures on...
M. Bennett, “Validity of the Drude Theory for Ag, Au and Al in the Infra-Red,” in: F. Abeles (ed.), Optical Properties and Electronic Structure of Metals and Alloys ,North-Holland, Amsterdam, 1966, p. 175. Google Scholar V. P. Duggal and R. Rup, J. Appl. Phys. 40, 492 ...
[47]. For planar metal films, Jeon and Grischkowsky measured a 1/epropagation length that was nearly 900 times shorter than predicted from the Drude theory at 0.4 THz (0.43 m instead of the predicted value of 385 m) [44]. Pandey et al. also measured this parameter on a variety of ...
To analyze the effect of absorption, we compare here results obtained for silver, which were used in our experimental studies and in previous theoretical work22. The dielectric constant in metals according to the Drude theory can be written as follow: $${\varepsilon }_{2}={\varepsilon }_{...
metalsmagnetizationcircularly polarized high-frequency electromagnetic wavetransparent mediumDrude approximationfree-electron gasmicroscopic solenoidal currentsAn analytic expression is given for the inverse Faraday effect, i.e., for the magnetization occuring in a transparent medium exposed to a circularly ...