3 Sep 05:44 2009

### define k-path for unconventional waveguide in MPB

ryanhao <ryanhao <at> vip.qq.com>

2009-09-03 03:44:18 GMT

2009-09-03 03:44:18 GMT

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.

=============================================

(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

Ran

_______________________________________________ mpb-discuss mailing list mpb-discuss <at> ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss