Re: [SIESTA-L] bands

2010-08-18 Por tôpico Christopher Rowan
Mashiat, As a follow up, band structure calculations require a fair bit of memory. So you may need to increase the number of processors. (Try it on a small system first.) Have you had any success? Chris 2010/8/11 Marcos Veríssimo Alves > Mashiat, > > It always helps to have the input file t

Re: [SIESTA-L] Basis optimization

2010-08-18 Por tôpico Marcos Veríssimo Alves
On Wed, Aug 18, 2010 at 6:46 PM, Koch, Robert J wrote: > I have this morning noticed this untrustworthiness actually (some very > large positive free energies). I think I will be adopting your strategy. > It's a strategy that is well-known in physics: you start from the minimal set of ingredient

Re: [SIESTA-L] Basis optimization

2010-08-18 Por tôpico Koch, Robert J
I have this morning noticed this untrustworthiness actually (some very large positive free energies). I think I will be adopting your strategy. One question about optimizing basis' in siesta has been bugging me: is this optimization completed to create efficient calculations, or to improve the

Re: [SIESTA-L] Basis optimization

2010-08-18 Por tôpico Marcos Veríssimo Alves
Robert, Two points: I also study a perovskite-like structure, with different chemical environments. Even if bond lengths are not homogeneous in your case, if your basis set is good enough, it should be able to take into account if they are not wildly different. Our structure also has different bon

RE: [SIESTA-L] Basis optimization

2010-08-18 Por tôpico Koch, Robert J
Marcos, Thanks for the advice. I actually did get the mpi execute command to work in the run_script for Simplex. Not sure what issue I was having before, perhaps it was something in the actual template. I'm trying to optimize the whole system for now. I'm reluctant to try your method simply

RE: [SIESTA-L] Ask for help

2010-08-18 Por tôpico Koch, Robert J
Zhendong Guo, In the future, could you please refrain from sending out three emails in ten minutes asking essentially the same question? Please give the list some time to receive, read, and answer before asking a second or third time. Thanks, Rob Koch From: 郭振东 [mailto:guozhendong.1...@163.

RE: [SIESTA-L] Mesh cutoff

2010-08-18 Por tôpico Koch, Robert J
Systematically raise it until your total energy varies only slightly. I’m new to computational physics/chemistry but I think this is it. From: 郭振东 [mailto:guozhendong.1...@163.com] Sent: Wednesday, August 18, 2010 3:29 AM To: siesta-l@uam.es Subject: [SIESTA-L] Mesh cutoff hello everyone W

[SIESTA-L] Mesh cutoff

2010-08-18 Por tôpico 郭振东
hello everyone Would you like to tell me how to set the value of mesh cutoff when I want to obtain an accurate result while using the least time? Thank you very much! Zhendong Guo 18th August

[SIESTA-L] Ask for help

2010-08-18 Por tôpico 郭振东
Hello everyone Would you like to tell me the biggest value of the mesh grid for the siesta and the factors influence the biggest value ? Thank you very much! Zhendong Guo 18th August

[SIESTA-L] Asking for help

2010-08-18 Por tôpico 郭振东
Hello,everyone, When I use the siesta ,I always encounter such errors:Segmentation fault! I think the reason is that the value of the mesh grid is too big.Would you like to tell me the factors which can influence the value of the mesh grid and the biggest value of the mesh grid? Thank you very