Register to reply 
Free electron approximation near the FBZ's boundary 
Share this thread: 
#1
Feb1313, 02:28 PM

P: 264

Consider nearly freeelectron approximation (here in one dimensional crystal). There is degeneracy at the border of Brillouin zone and one can solve the problem using first order degenerate perturbation theory at the border. But many of text books also use degenerate perturbation theory for the points near the border whereas there isn't any degeneracy there. What is the reason?



Register to reply 
Related Discussions  
Semi free electron approximation and band gap  Atomic, Solid State, Comp. Physics  0  
Approximation of integral for small boundary  Introductory Physics Homework  3  
Approximation of boundary value problem using finite differences  Calculus & Beyond Homework  0  
Free Electron Model: Why periodic boundary conditions and what is L ?  Atomic, Solid State, Comp. Physics  4  
FD approximation at internal boundary condition  Advanced Physics Homework  0 