Re: Re: [SIESTA-L] Any comments on the MeshCutoff

2012-11-21 Por tôpico 毛飞
(such as different MeshCutoffs), it will bring about 0.2~0.3 eV errors artificially. What about your opinions? Any comment or suggestion is appreciated. Regards Fei Mao > -原始邮件- > 发件人: "Oleksandr Voznyy" > 发送时间: 2012年11月22日 星期四 > 收件人: siesta-l@uam.es > 抄送:

Re: [SIESTA-L] Any comments on the MeshCutoff

2012-11-21 Por tôpico Oleksandr Voznyy
> The way to converge it is just by making it larger and larger until the property you are interested in is converged within the tolerance you need. I want to comment that Etot vs Ecutoff is converging very slowly, and looking at that curve one might want to go as high as 800Ry. On practice pe

Re: [SIESTA-L] Any comments on the MeshCutoff

2012-11-21 Por tôpico Emilio Artacho
Hi Fei The mesh cutoff controls the accuracy in the calculation of some integrals in real space. It is no a variational parameter in the sense that more accurate does not mean lower energy. The way to converge it is just by making it larger and larger until the property you are interested in is co