Dear Wien2k, the electron-phonon coupling can be calculated by using the formula
*Lambda=(Eta)/(m<w^2>)*, Here Eta is Hopefield parameter and can be written as *Eta= N(Ef)*<I^2>*, Here N(Ef) is total density of states and <I^2> is the square of electron-phonon matrix element over fermi surface. By using some approximations <w^2> can be written as 0.5*(Theta D^2), here Theta D is Debye temperature. And m is average atomic mass So the final formula will become as *Lambda=(N(Ef)*<I^2>)/(m*0.5*Theta D^2).* Here i am facing the problem how to approximate the <I^2> value from wien2K band structure calculations. Please suggest a solution. -- *P. Rambabu* PhD Scholor Physics, IIT Hyderabad Mobile: 9074508220.
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