1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Phonon frequency analysis

  1. Jan 10, 2009 #1
    Hello all,

    I have calculated the phonon energies and frequencies in some code for bulk GaAs. Now I want to analyse these frequencies, I do not know which ones are the acoustic ones which are the optical and how I can recognize the LOTO splitting ?!?! Here is the calculated phonons:

    Phonon at Gamma, with non-analyticity in the
    direction (cartesian coordinates) 0.00000 0.00000 1.00000
    Phonon energies in Hartree :
    5.665992E-06 4.014680E-06 8.180712E-06 4.137327E-04 4.137535E-04
    1.190558E-03 1.862773E-03 1.862777E-03 2.004961E-03 2.004964E-03
    2.515178E-03 2.565316E-03
    Phonon frequencies in cm-1 :
    - 1.243542E-01 8.811204E-01 1.795459E+00 9.080384E+01 9.080840E+01
    - 2.612972E+02 4.088315E+02 4.088322E+02 4.400381E+02 4.400387E+02
    - 5.520177E+02 5.630218E+02

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

Can you offer guidance or do you also need help?
Draft saved Draft deleted