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影暖陽(yáng)新蟲(chóng) (初入文壇)
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[求助]
請(qǐng)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(qǐng)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(gè)忙,最近看文獻(xiàn)很頭痛 |
專家顧問(wèn) (著名寫(xiě)手)
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專家經(jīng)驗(yàn): +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(dāng)這個(gè) surface state 落在 gap 裡且同時(shí) 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(huì)不同 可能會(huì)在 CBM 上 (positive electron affinity) 也可能會(huì)在 VBM 下 (negative electron affinity) 當(dāng)然,也是有可能出現(xiàn)在 gap 裡 參考資料 http://en.wikipedia.org/wiki/Electron_affinity |
新蟲(chóng) (初入文壇)
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