| 词条 | Ionized impurity scattering |
| 释义 |
In quantum mechanics, ionized impurity scattering is the scattering of charge carriers by ionization in the lattice. The most primitive models can be conceptually understood as a particle responding to unbalanced local charge that arises near a crystal impurity; similar to an electron encountering an electric field.[1] This effect is the mechanism by which doping decreases mobility. In the current quantum mechanical picture of conductivity the ease with which electrons traverse a crystal lattice is dependent on the near perfectly regular spacing of ions in that lattice. Only when a lattice contains perfectly regular spacing can the ion-lattice interaction (scattering) lead to almost transparent behavior of the lattice. Impurity atoms in a crystal have an effect similar to thermal vibrations where conductivity has a direct relationship between temperature. A crystal with impurities is less regular than a pure crystal, and a reduction in electron mean free paths occurs. Impure crystals have lower conductivity than pure crystals with less temperature sensitivity in that lattice.[2] See also
References1. ^{{cite web | url=http://www.superstrate.net/pv/mobility/impurity-scattering.html | title=Ionized impurity scattering | accessdate=September 26, 2011}} 2. ^{{cite book|author=Kip, Arthur F.|title=Fundamentals of Electricity and Magnetism|pages=211–213|publisher=McGraw-Hill|isbn=0-07-034780-8}} External links{{cite book|author=Lundstrom, Mark |title=Fundamentals of carrier transport |pages=58–60|publisher=Cambridge University Press 2000 |isbn=0-521-63134-3}}{{DEFAULTSORT:Ionized Impurity Scattering}} 1 : Quantum mechanics |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。