5/2/11

Summary of tight binding model

As it appears from the model name, in this approximation electrons are tightly bind to their atoms with limited interaction with other atoms in their neighbor. this approximation minimise the overlap. but small correction in Hamiltonian is needed.

1 comment:

  1. The crystal Hamiltonian H is:
    H=Hat+deltaU(r), where deltaU(r) is the correction and Hat is the Hamiltonian for an atom whose lattice point we take as the origin.
    Ref: Arshcroft and Mermin

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