Hi.
A few weeks ago I have the same problema that you. I write here that you
need to calculate bands structure

WriteBands          true

BandLinesScale   pi/a

%block Bandlines
1 1.000 1.000 1.000 L
25 0.000 0.000 0.000 \Gama
30 2.000 0.000 0.000 X
10 2.000 0.500 0.500 U
35 0.000 0.000 0.000 \Gama
%endblock block Bandlines

The bands lines can be scaled by pi/a or Recipprocal Lattice Vectors. I
think that it is more easy by ReciprocalLatticeVectors. But I think that
according your data are scaled by pi/a.

In systemlabel.bands are the bandlines. Then, you have to compile gnubands
(utility directory): ./gnubands <systemlabel.bands> bandsoutput.
Now, you have a file, use this file to plot bands stracture with gnuplots,
xmgrace, sigmaplot, origin, matlab, ect.
Coordinates of k points are at the end of systemlabel.bands and energy
fermi are in the top of file.bands.


As I said above, few weeks ago I had the same problem. I wrote to
L-SIESTA, with the subject "Band structure calculations and K-points",
check it. It helps me a lot.




> Dear All,
>
> I am new user SIESTA. I would like to calculate the band structure 0f C80
> fullerene. Below I have written the input for the band structure and my
> results is showing just the straight line. Can any body tell me the what
> is
> wrong in my input? Please help how to use the X.band file for band
> structure?
>
> Thanks!
> SC
>
> %block BandLines
>      1 1.000 1.000 1.000 L
>     25 0.000 0.000 0.000 \Gama
>     30 2.000 0.000 0.000 X
>     10 2.000 0.500 0.500 U
>     35 0.000 0.000 0.000 \Gama
> %endblock BandLines
>
> %block WaveFunKPoints
>   0.000 0.000 0.000 free 1 to 10
> %endblock WaveFuncKpoints
>

Responder a