QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: h_almasi on March 22, 2015, 11:12

Title: multigrid residual error
Post by: h_almasi on March 22, 2015, 11:12

Hi everyone,
I'm working on graphene tunneling FET. I built the structure in the Builder and used these settings in the Script Generator
New Calculator :
                           GGA, PBE
                           K-points: 1*1*100
                           Possion Solver: multi-grid, A&B (Neumman) C(Dirichlet)
Transmission Spectrum : -2 to 2 ev , 201 points per segments
I ran the simulation but the following  error occurred
"... multigrid residual is greater than required accuracy..."
Could you please help me with this error?
thanks a lot for your consideration.

Title: Re: multigrid residual error
Post by: Umberto Martinez on March 23, 2015, 11:17

you should provide more details about your system.
Otherwise, search through the forum since this question has been asked already . For example, some hints here,
http://quantumwise.com/forum/index.php?topic=3265.msg14968#msg14968