Dear Prof. Johnson and MPB user,
For a noraml W1 waveguide, the K-path in MPB is defined like this:
=============================================
(define Gamma (vector3 0 0 0))
(define K' (lattice->reciprocal (vector3 0.5 0 0)))
(set! k-points (interpolate 50 (list Gamma K')))
==============================================
but how about the repeated unit takes 2 lattice constant? how to define
the K-path? see attached.
I have tried to decrease the reciprocal lattice to 1/2 of its previous
value, but the result is wrong.
I have rather bad knowledge for reciprocal space. I read your book but I
can not solve it. please help me.
Thank you.
Sincerely
Ran
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