| 24小時(shí)熱門版塊排行榜 |
| 5 | 1/1 | 返回列表 |
| 查看: 2393 | 回復(fù): 4 | |||
yankai131鐵蟲(chóng) (小有名氣)
|
[交流]
【求助】不太明白Hubbard U與U、J的意義,J值如何算,麻煩高人指點(diǎn)下! 已有3人參與
|
|
MS中的問(wèn)題,不太明白Hubbard U與U、J的意義,J值如何得到?麻煩高人指點(diǎn)下! 有資料說(shuō):“Materials Studio 4.3版本中也給出了一些元素默認(rèn)的U數(shù)值(實(shí)際是Ueff=U-J)”還是不大明白 本人基礎(chǔ)較差! ![]() [ Last edited by yankai131 on 2010-5-17 at 14:04 ] |
木蟲(chóng) (正式寫手)
star watcher
鐵蟲(chóng) (小有名氣)
鐵桿木蟲(chóng) (著名寫手)
GG
|
The Coulomb repulsion is characterized by a spherically averaged Hubbard parameter U describing the energy increase for placing an extra electron on a particular site, U = E(dn+1) + E(dn−1) − 2E(dn), and a parameter J representing the screened exchange energy. While U depends on the spatial extent of the wavefunctions and on screening, J is an approximation of the Stoner exchange parameter and almost constant, ∼1 eV [11]. The Mott–Hubbard Hamiltonian includes energy contributions already accounted for by the DFT functional. To correct for this ‘double-counting’, equation (1) is evaluated in the limit of integer occupancies and subtracted from the DFT energy to obtain the spin-polarizedDFT+U energy functional [9, 11]. A simple functional is obtained after some straightforward algebra [9] |

鐵桿木蟲(chóng) (著名寫手)
GG

| 5 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 266分,求材料相關(guān)專業(yè)調(diào)劑 +10 | 哇呼哼呼哼 2026-03-30 | 12/600 |
|
|---|---|---|---|---|
|
[考研] 347求調(diào)劑 +8 | 山頂見(jiàn)α 2026-03-25 | 8/400 |
|
|
[考研] 282求調(diào)劑 不挑專業(yè) 求收留 +3 | Yam. 2026-03-30 | 4/200 |
|
|
[考研] 291求調(diào)劑 +12 | Y-cap 2026-03-29 | 15/750 |
|
|
[考研] 085600 286分 材料求調(diào)劑 +11 | 麻辣魷魚(yú) 2026-03-27 | 12/600 |
|
|
[考研] 抱歉 +3 | 田洪有 2026-03-30 | 3/150 |
|
|
[考研] 332求調(diào)劑 +6 | @MZB382400 2026-03-28 | 6/300 |
|
|
[考研] 284求調(diào)劑 +14 | junqihahaha 2026-03-26 | 15/750 |
|
|
[考研] 332求調(diào)劑 +6 | Lyy930824@ 2026-03-29 | 6/300 |
|
|
[考研] 290求調(diào)劑 +3 | dfffsar 2026-03-29 | 3/150 |
|
|
[考研] 327求調(diào)劑 +6 | 汲亦昊 2026-03-29 | 6/300 |
|
|
[考研] 343求調(diào)劑 +6 | 愛(ài)羈絆 2026-03-29 | 6/300 |
|
|
[考研] 332求92調(diào)劑 +8 | 蕉蕉123 2026-03-28 | 8/400 |
|
|
[考研] 2026年華南師范大學(xué)歡迎化學(xué),化工,生物,生醫(yī)工等專業(yè)優(yōu)秀學(xué)子加入! +3 | llss0711 2026-03-28 | 6/300 |
|
|
[考研] 265求調(diào)劑 +8 | 小木蟲(chóng)085600 2026-03-27 | 8/400 |
|
|
[考研] 一志愿211院校 344分 東北農(nóng)業(yè)大學(xué)生物學(xué)學(xué)碩,求調(diào)劑 +5 | 丶風(fēng)雪夜歸人丶 2026-03-26 | 8/400 |
|
|
[考研] 化學(xué)調(diào)劑 +4 | 愛(ài)吃番茄的旭 2026-03-24 | 5/250 |
|
|
[考研] 272求調(diào)劑 +7 | 腳滑的守法公民 2026-03-27 | 7/350 |
|
|
[考研] 0856調(diào)劑 +5 | 求求讓我有書(shū)讀?/a> 2026-03-26 | 6/300 |
|
|
[考研] 考研一志愿蘇州大學(xué)初始315(英一)求調(diào)劑 +3 | sbdksD 2026-03-24 | 4/200 |
|