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[求助]
在優(yōu)化Ce的時(shí)候不收斂,請(qǐng)各位大俠幫我看看是不是哪塊設(shè)置有問(wèn)題?
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CASTEP文件里有這樣的文字 Warning: There are no empty bands for at least one kpoint and spin; this may slow the convergence and/or lead to an inaccurate groundstate. If this warning persists, you should consider increasing nextra_bands and/or reducing smearing_width in the param file. Recommend using nextra_bands of 6 to 13. |
金蟲 (正式寫手)
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算CeO2還是Ce2O3?還是surface? Ce不收斂很正常,通常加上一些空帶會(huì)改善收斂(就是英文提示的意思),但并不是每次都管用,這和你計(jì)算的體系有關(guān)。 smearing,degauss,ecut,Hubbard U,SCF conv,mixing-beta很多參數(shù)都會(huì)影響Ce這類體系的收斂,情況很復(fù)雜,樓主的提問(wèn)信息量太少,無(wú)法給出更多的建議。 |
木蟲 (正式寫手)
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我算的Al4ce 改了空帶設(shè)置之后,還是不收斂。******************************************************** Warning: electronic minimisation did not converge during finite basis set correction. ******************************************************** Checkpoint file cannot be written. Error calculate_finite_basis : Convergence failed when doing finite basis set correction. Current trace stack: calculate_finite_basis_corr check_elec_ground_state castep |
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