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Author Topic: multigrid residual error  (Read 2614 times)

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Offline h_almasi

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multigrid residual error
« 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.
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Offline Umberto Martinez

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Re: multigrid residual error
« Reply #1 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
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