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xiewenze木蟲 (正式寫手)
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[求助]
關(guān)于“total drift”的問題 已有1人參與
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請教“total drift”的具體含義是什么,手冊上好像只是說平移不應(yīng)該超過力的量級,但是具體指什么呢?貌似不是各原子受力之和吧? 另外在加電場設(shè)置EFIELD=-0.1之后,各原子受力基本小于設(shè)置的0.02,但是 total drift: 0.000000 0.000034 22.389318 這里z方向平移怎么會這么大? |

木蟲 (正式寫手)

鐵桿木蟲 (著名寫手)
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Another important hint that the wrap around errors are too large is given by the forces. If there is a considerable drift in the forces, increase the FFT-mesh. Search for the string 'total drift' in the OUTCAR file, it is located beneath the line TOTAL-FORCE: total drift: -.00273 -.01048 .03856 The drift should definitely not exceed the magnitude of the forces, in general it should be smaller than the size of the forces you are interested in (usually 0.1 eV/$ .AA$). |
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