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fanqy1991金蟲 (著名寫手)
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[求助]
聲子普計(jì)算 提示錯(cuò)誤 已有1人參與
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*ERROR* in PHONON calculation: Prerequisite GEOMETRY OPTIMISATION ? ? has not been performed or is not converged to sufficient accuracy. ? ? ? ? Maximum force |F|max = 0.2850 eV/A ? ? Parameter GEOM_FORCE_TOL = 0.5000E-01 eV/A ? ? ? ? This could be because of any of the following ? ? (a) No geometry optimisation was performed ? ? (b) A geometry optimisation failed to converge ? ? (c) An error was made copying the optimised geometry to this .cell file ? ? (d) Cutoff, k-point sampling or other convergence parameter differ ? ? from the geometry optimisation run to this one. ? ? Please check your input parameters and if necessary run or re-run a ? ? geometry optimisation calculation. ? ? ? ? Alternatively increase value of GEOM_FORCE_TOL to 0.2850 or greater ? ? to allow this run to proceed at risk of inaccurate phonon frequencies. ? ? ? ? Typically a force tolerance convergence of 0.025 eV/A is necessary to ? ? obtain well converged phonon frequencies althout a smaller value can be ? ? required in the presence of weak forces, e.g. in molecular crystals ? 在計(jì)算聲子譜的過(guò)程中一直提示這個(gè)錯(cuò)誤,但是我的幾何優(yōu)化已經(jīng)到達(dá)標(biāo)準(zhǔn), +-----------+-----------------+-----------------+------------+-----+ <-- BFGS | Parameter | value | tolerance | units | OK? | <-- BFGS +-----------+-----------------+-----------------+------------+-----+ <-- BFGS | dE/ion | 3.633309E-008 | 5.000000E-006 | eV | Yes | <-- BFGS | |F|max | 4.539755E-003 | 1.000000E-002 | eV/A | Yes | <-- BFGS | |dR|max | 6.792119E-006 | 5.000000E-004 | A | Yes | <-- BFGS | Smax | 1.306491E-002 | 2.000000E-002 | GPa | Yes | <-- BFGS +-----------+-----------------+-----------------+------------+-----+ <-- BFGS 并且內(nèi)存也夠,但那時(shí)就是不知道 Maximum force |F|max = 0.2850 eV/A 這個(gè)數(shù)據(jù)是哪里來(lái)的?有沒有知道的大神指導(dǎo)一下 |
新蟲 (初入文壇)
木蟲 (正式寫手)

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