questions about the dielectric constant of silicon.

[irene33039]

Hello, I am a student from TsingHua University, Taiwan, recently I am using Quantum Espresso to simulate the dielectric constant of materials, I saw that you have shared the simulation results of silicon, but I will provide you with the code for silicon simulation, but it is not the same as the result of the dielectric constant graphs, I will change the kpoint in the nscf to 6 6 6 6 0 0 0 in order to comply with your results, I would like to ask what may be the cause of this? I would like to ask what could be the cause of this. Thank you for your help!