You apparently didn't specify a k range that includes the solution in find-k.
Honestly, to make isofrequency plots it is much easier to just supply a grid of k-points (filling the Brillouin zone) to (run), rather than using find-k. Then you just plot the grid of frequencies in some contour plotting program (e.g. with Matlab's "contour" command). Regards, Steven G. Johnson On Fri, 18 Jan 2008, Youri Bae wrote: > Hello, > > I would like to plot equifrequency contour of the second band. I can > successfully plot equifrequency contour of the first band, but it's always > returns like the following message: > > ERROR: failed to bracket the root in find-root-deriv > > Thank you. > > Youri > _______________________________________________ mpb-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
