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影暖陽新蟲 (初入文壇)
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[求助]
請教各位 已有1人參與
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| Surface states in the band gaps of free-electronlike s, p bands are common to many surfaces.Predicted already in 1939 by Shockley,such states have been observed in photoemission from a wide class of metal surfaces. A very special case arises when such states are located in a gap which contains the vacuum level. 我想請教一下各位,這段話最后一句怎么理解,就是a gap which contains the vacuum level。希望知道的人們幫個忙,最近看文獻很頭痛 |
新蟲 (初入文壇)
專家顧問 (著名寫手)
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專家經(jīng)驗: +20 |
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A very special case arises when such states are located in a gap which contains the vacuum level. 有一特殊的例子就是當這個 surface state 落在 gap 裡且同時 vacuum sate 也在 gap 裡 vacuum state 在不同表面系統(tǒng)下 其出現(xiàn)在的位置也會不同 可能會在 CBM 上 (positive electron affinity) 也可能會在 VBM 下 (negative electron affinity) 當然,也是有可能出現(xiàn)在 gap 裡 參考資料 http://en.wikipedia.org/wiki/Electron_affinity |
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