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Debanjana Adhikari posted an Question
May 19, 2020 • 16:02 pm 30 points
  • CSIR NET
  • Physical Sciences

In a band structure calculation, the dispersion relation for electrons is found to be 6, = plcosk,a + cosk,a + cosk,a) where ß is a constant and a is the lattic

In a band structure calculation, the dispersion relation for electrons is found to be 6, = Plcosk,a + cosk,a + cosk,a) where ß is a constant and a is the lattice constant. The effective mass at the boundary of the first Brillouin zone is h C)2a (a) (b)4 Spa Sa2 d) 3pa

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    Dhairya sharma

    dear I already attached it's solution plz see that.

  • comment-profile-img>
    Debanjana adhikari

    how can we take the derivative w.r.t dk & do the derivative on R.H.S w.r.t dkx, dky, & dkz??

  • comment-profile-img>
    Ruby negi best-answer

    solution.... remember the formula of effective mass as sometimes question I'm this topic is directly formula based..this ques is also formula based only u have to remember formula..

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  • comment-profile-img>
    Chandra prakash Best Answer

    see attached file it's very helpful for you dear

    cropped51290455.jpg
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