k points for device and bulk of ZGNR

[GJK]

Dear all,

I wonder why we need less k points for bulk and more for device calculations are used during optimization of  ZGNR.

Your assistance is required???

[Anders Blom]

http://quantumwise.com/publications/tutorials/mini-tutorials/214-why-are-so-many-k-points-needed-in-the-transport-direction-in-a-device-calculation