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

Why a pair is exciton?

  1. May 12, 2010 #1

    i cant understand what is the motivation of defining pair of hole and electron as
    a single particle, exciton. thus they seem to have distinct motion and space. so
    why still we treat them as excitons?
  2. jcsd
  3. May 12, 2010 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    Because they are still coupled together and can be treated as "one".

    There's nothing unusual here. You treat a collection of electrons, protons, and neutrons as "one" entity and called it an 'atom'. As long as there's some form of coupling that allows us to treat a system as being an entity (and back it up with valid observations), then then treatment is perfectly fine.

  4. May 12, 2010 #3

    that was very helpful :smile:

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - pair exciton Date
A Semiconductor amorphous Jan 21, 2017
I Cooper-Pair Density Near A Conductor's surface Sep 16, 2016
I Cooper pair density Jul 10, 2016
I Wavelength of Cooper pairs Jun 21, 2016
Exciton is electron-hole pair Oct 1, 2009