Parameter for numerical integration over the Brillouin
Zone (k-space).
An integer value should be supplied. 1=absolutely minimal (only the
G-point is used),
2=linear tetrahedron method, coarsest possible spacing, 3=quadratic
tetrahedron method, coarsest
spacing. Higher values should be chosen odd (5, 7,..) to use the quadratic
method; even values (4,6,..)
trigger the linear tetrahedron method, which is usually by far
inferior.
cpu-time increases very rapidly with higher kspace-values:
try 3 for a reasonable result, or 5 for higher precision.
The key may occur as a block key, the contents of the key are options
that handle in more detail the integration of
the Brillouin zone.
E.g. the subkey Kinteg
takes over the simple key Kspace.
For other settings, see the explanation of Kspace
in the second list.
Default depends on Accuracy, the
integration parameter in real space.
