Re: [SIESTA-L] optical gap < band gap ??

[Alexander Vozny]

I used a high (actually 3000K = 0.25 eV
If you try to plot the Fermi-Dirac distribution, you would see that it 
is by far more than 0.25eV smearing.

But in principle you're right: some of the conduction bands become occupied
therefore at the end also "intraband" transitions become
considered. Right?
Exactly.