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Spin-orbit in bandstructure

  1. Feb 14, 2012 #1
    please help me. i realy need a quick reply.

    I study the bandStructure of SrS with and without Spin-orbit but I have no enough information to explanation it.
    the Sr has([kr] 4s2 4p6 5s2) and S has([Ne] 3s2 3p4) Structure. I attache the bandStructure of this compound calculated using pseudopotential(dot-line is with spin-orbit and solid line without Spin-orbit effect).
    the lowest band is (4s Sr) the second band is (4p Sr) the , third line is (3s S) and the band below the fermi is (3p s).
    I have two question?
    1.degeneracy in (4p Sr)band is 3-fold or 6-fold?

    2. If the degeneracy for 3band of p like is 3-fold, why we have 3-fold degeneracy in [itex]\Gamma[/itex] point but 2-fold in [itex]X[/itex] point in absent of Spin-orbit? I mean in absent of spin-orbit, what effect splits degeneracy(crystal field)?

    3. I don't know how use of H=[1]/[2m2C2r] [dV]/[dr] L.S
    to interpret difference in strong splitting between 4p Sr and 3p S?

    please i need a quick reply.

    Attached Files:

  2. jcsd
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