swcnt-bands-v0.1

Stable enough version of the cnt band structure tool.
For a given carbon nanotube (n,m) parameters, this little script calculates and displays:

• linear and helical unit cells;
• linear and helical Brillouin zones;
• linear and helical electron band structure;
• helical effective mass approximation of the dispersion relation of bright and dark singlet excitons.