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順?biāo)?/a>金蟲 (小有名氣)
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[求助]
vasp里的OUTCAR里的 magnetization (x)和OSZICAR里的mag= 怎么區(qū)分? 已有1人參與
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OUTCAR里的 magnetization (x)和OSZICAR里的mag= 怎么區(qū)分? 貌似兩個數(shù)值不一樣。分別代表什么意義。 整個體系的磁矩用哪個數(shù)值? 謝謝大家了。 |
木蟲 (小有名氣)

至尊木蟲 (著名寫手)
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整個體系的磁矩用OSZICAR中的。關(guān)于兩者不同的原因參見以下解釋: The difference of the magnetic moments as given in OUTCAR and OSZICAR are due to the following reason: 1) in the last line of OSZICAR, the total magnetisation of the unit cell (as defined by the Bravais matrix in POSCAR) is given 2) in the 'tot' line of OUTCAR, the sum of the LOCAL magnetic moments is given. These local moments are obtained by taking the difference of spin up and down charge in the 'spheres' defined by RWIGS (either from POTCAR or from INCAR), centered at the atoms' positions. The sum of these spheres usually is smaller than the total volume of the unit cell. The difference thus corresponds to the contributions of the 'interstitial' region between the spheres. https://www.vasp.at/forum/viewtopic.php?t=426 簡單來說,就是OUTCAR中每個原子磁矩的計(jì)算是在其RWIGS半徑中積分得到的,所有原子磁矩的加和并不能把整個cell積分完全。因此,導(dǎo)致兩者之間的區(qū)別。 |
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