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zhangfrank金蟲(chóng) (正式寫(xiě)手)
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[求助]
【求助】關(guān)于表面計(jì)算,請(qǐng)教2個(gè)問(wèn)題 已有2人參與
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如題,在用vasp做六角GaN的表面吸附原子,看不同吸附原子的表面態(tài)的變化相關(guān)的計(jì)算。有2個(gè)問(wèn)題想請(qǐng)教一下: 1. 六角氮化鎵的表面是極性表面,在做表面計(jì)算時(shí)候是否需要加偶極矩矯正的參數(shù)?,是否加偶極矩矯正的參數(shù)會(huì)對(duì)表面的哪些性質(zhì)有影響?如果加的話,是在vasp設(shè)置哪些參數(shù),以及需要在哪些步驟添加?(優(yōu)化,自洽,dos?) 2. 在有的地方看到表面有quantum confinement effect,請(qǐng)問(wèn)quantum confinement effect這個(gè)是什么意思,是如何引入的,對(duì)表面態(tài)有什么影響,是否需要避免以及如何避免呢? 感謝大家的幫助 |

金蟲(chóng) (正式寫(xiě)手)

木蟲(chóng) (著名寫(xiě)手)
| 個(gè)人覺(jué)得要考慮偶極修正,這個(gè)修正對(duì)功函數(shù)有很大影響,,,參數(shù)的話樓主自己看手冊(cè),里面有,,,第二個(gè)問(wèn)題,量子限域效應(yīng)需要樓主看書(shū)的,,, |
金蟲(chóng) (正式寫(xiě)手)

專(zhuān)家顧問(wèn) (著名寫(xiě)手)
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專(zhuān)家經(jīng)驗(yàn): +20 |
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1. ????????????????????棬?????????????????????????????????????????????????????????????????Щ??????????????????????vasp??????Щ????????????????Щ?????????????????????dos???? > dipole correction ?????? 2D ??y????? ??????r???????????г??F dipole ?r ??????f?????O ?????????c?±???M???????????r???????γ? dipole ??????????ИO??????@??????? ??r????? dipole correction VASP ????????????? IDIPOL, LDIPOL, DIPOL ????????? dipole ????νY???????Y?????? ??Щ?S ?? ???????????????? ????? ?@?????? dipole correction ????y ???h?????^??β????? dipole correction 2. ???е?????????????quantum confinement effect??????quantum confinement effect???????????????????????????????????????????????????α?????? > quantum confinement effect ?f?????????L ?????ε??Z?????f ?????????????? (quantum) ???????????? (confinement) ?????F?c???^????????????| ???? quantum confinement effect ?Еr??Q?? quantum size effect quantum confinement effect ???????????????? ????????????????M?????r?? ??????f?????? ??? ?? ???? ?????????????????? ????????????? ??????????????????????r quantum confinement effect ??????@?????Y?? ?????????????Y???п??? ??????????????????B?о? quantum confinement effect ????????? ????????????? ????~ ?????? "???" ?? (converge) |
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