Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A couple of quick questions on screening / lattice deformation

  1. Apr 25, 2015 #1
    If a material is doped (introducing positive dopants to the lattice) there will be a build up of negative cahrge around them, screening. I have a couple of questions that seem obvious but I'm still a little unsure:

    1) how would more screening effect resistivity? I would assume that a build up of negative charge would hinder conduction but the impression i'm getting from the notes is that it increases conductivity??

    2) (possibly unrelated to screening) if say the dopant has smaller atoms and introduced defects into the lattice please could someone tell me how that would effect the phonons? if that makes sense? how would a lattice deformation effect resistivity / conductivity.

    I have all the formulas for calculations but i'm trying to visualise these effects a little more. Any help would really be welcome.
  2. jcsd
  3. Apr 30, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook