Hi,
I have some doubt in the MPB file tri-rod.ctl (reproduced here) ,a program
for triangular lattice.
(set! num-bands 8)
(set! geometry-lattice (make lattice (size 1 1 no-size)
(basis1 (/ (sqrt 3) 2) 0.5)
(basis2 (/ (sqrt 3) 2) -0.5)))
(set! geometry (list (make cylinder
(center 0 0 0) (radius 0.2) (height infinity)
(material (make dielectric (epsilon 12))))))
(set! k-points (list (vector3 0 0 0) ; Gamma
(vector3 0 0.5 0) ; M
(vector3 (/ -3) (/ 3) 0) ; K
(vector3 0 0 0))) ; Gamma
*Why basis1 is not defined as basis1 ( 0.5 (/ (sqrt 3) 2)) and basis2
as basis2 ( 0.5 (/ (sqrt 3) -2)) if we refer the fig(enclosed here)
from the books" Photonic Crystal--Modelling the flow of light"?? *
*and while defining the k points also with the reciprocal lattice
vector, why it is not *
* vector3
0 0 0) ; Gamma*
* (vector3 0 0.5 0) ; M
(vector3 0.5 0.5 0) ; K
(vector3 0 0 0))) ; Gamma*
*since M point is half of b1, K point is half of b1 plus half of b2.*
_______________________________________________
mpb-discuss mailing list
mpb-discuss@ab-initio.mit.edu
http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
