Band structures of graphene

set term postscript eps enhanced

set output 'grp.bands.eps'

xmin=0.0 ; xmax=2.1294

ymin=-20 ; ymax=7

K1=xmin ; G = 0.899973;M=1.679372;K2=xmax

set nokey

set size 0.4,0.5

set xrange [xmin:xmax]

set yrange [ymin:ymax]

set arrow from G, ymin to  G,ymax nohead lt 5 lw 1

set arrow from M, ymin to  M,ymax nohead lt 5 lw 1

set noxtics

set ylabel 'E - E_F (eV)' font "Times-Roman, 14"

set noxlabel

set title "Band structure of graphene " font 'Times-Roman, 16'

set xtics ('K' K1,'{/Symbol G}' G, 'M' M,'K' K2)

set ytics ymin,4,ymax font 'Helvetica, 12'

plot 'grp.bands.dat' u 1:2 w l lt 1 lw 2