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zhl2967銅蟲 (小有名氣)
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[交流]
【求助】zasr='simple'是什么意思 已有1人參與
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| 請(qǐng)問各位,用q2r.x計(jì)算實(shí)空間力常數(shù)矩陣時(shí),輸入卡里面的zasr='simple'或者zasr='crystal'有什么區(qū)別嗎?謝謝了 |
木蟲 (小有名氣)
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! zasr : Indicates type of Acoustic Sum Rules used for the Born ! effective charges (character): ! - 'no': no Acoustic Sum Rules imposed (default) ! - 'simple': previous implementation of the asr used ! (3 translational asr imposed by correction of ! the diagonal elements of the force-constants matrix) ! - 'crystal': 3 translational asr imposed by optimized ! correction of the IFC (projection). ! - 'one-dim': 3 translational asr + 1 rotational asr ! imposed by optimized correction of the IFC (the ! rotation axis is the direction of periodicity; it ! will work only if this axis considered is one of ! the cartesian axis). ! - 'zero-dim': 3 translational asr + 3 rotational asr ! imposed by optimized correction of the IFC. ! Note that in certain cases, not all the rotational asr ! can be applied (e.g. if there are only 2 atoms in a ! molecule or if all the atoms are aligned, etc.). ! In these cases the supplementary asr are cancelled ! during the orthonormalization procedure (see below). |
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