Dear all,

Hi, hope you all have a good day.

I need some help to check some certain parameters in CASTEP that used in calculating the band structure.

The parameters(.param) were,

********************* Electronic Spectroscopy Parameters **********************
 
electronic spectroscopy with theory level : DFT  
spectroscopy calculation : band structure
max. number of iterations : 60
max. steps per iteration : 5
number of bands / k-point : 411
band convergence tolerance : 0.1000E-04 eV
write orbitals file : off
using electronic spectroscopy functional : hybrid HSE06
parallelepiped integration : on
x-size of parallelepiped : 8
y-size of parallelepiped : 8
z-size of parallelepiped : 8
k-screen averaging scheme : none - use natural jellium density
k-screening update : off

*******************************************************************************

In here, can I get any information or even reference about the parameters written in bold?

Some of them are found, but I'm not sure about what I found.

So if anyone knows about these parameters, anything, even a little thing, would be very helpful.

Thank you always!