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- Summary
- quantum physics in solids - momentum operator

Is there a relationship between the momentum operator matrix elements and the following:

<φ|dH/dk

where k

such that if I have the latter calculated for the x direction as a matrix, I can get the momentum operator matrix elements from it?

<φ|dH/dk

_{x}|ψ>where k

_{x}is the Bloch wave numbersuch that if I have the latter calculated for the x direction as a matrix, I can get the momentum operator matrix elements from it?