Dear Professor Steven and MPB users, Using the code below, I found that two theoretically equivalent X points in the BZ of a square lattice give very different results for the output fields. I have a lattice of air holes in a PC slab and I am outputting the field of the second band at two equivalent X points.
Has anyone else encountered this problem before? Thank you for considering my question! Janos Department of Physics MIT (define-param h 0.316) ; the thickness of the slab (define-param eps 10.56) ; the dielectric constant of the slab (define-param r 0.4) ; the radius of the holes (define-param supercell-h 4) ; height of the supercell (set! geometry-lattice (make lattice (size 1 1 supercell-h))) (set! geometry (list (make block (material (make dielectric (epsilon eps))) (center 0) (size infinity infinity h)) (make cylinder (material air) (center 0) (radius r) (height supercell-h)))) (set! k-points (list (vector3 0 0.5 0) (vector3 0.5 0 0) )) (set-param! resolution (vector3 32 32 16)) (set-param! num-bands 2) (define (output-some-efields b) (if (= b 2) (output-efield b))) (begin-time ; (run-zeven fix-efield-phase output-some-efields)) (display-eigensolver-stats)
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