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飄在空中的雨金蟲 (小有名氣)
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[求助]
摻雜體系形成能的計算
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計算TiO2 體系 一個 Sn 取代 Ti 原子后的形成能:根據(jù): E(form)=E(doped)-[E(pure)+μSn-μTi] 其中Sn 和 Ti 的化學(xué)勢怎么計算?請高手詳細解答告訴一下。 文獻提示: μSn is the chemical potential of the impurity Sn taken as the free energy of one Sn atom in bulk Sn. Under equilibrium conditions, the concentration of a point defect is controlled by its formation energy, which depends on the chemical potentials of the host and impurity atoms. For TiO2, the chemical potentials of O and Ti satisfy the relationship μTi + 2μO =μTiO2, μO ≤ μO2/2, and μTi ≤ μTi 金屬. The chemical potential μO is determined by the energy of an O2 molecule in the O-rich growth condition (corresponding to a high value of μO). By referencing μO to the energy of an O atom in the O2 molecule, μTi in the Ti-rich condition (corresponding to a high value of μTi) amounts to the energy of one Ti atom in bulk Ti. |
MaterialStudio學(xué)習(xí)使用 | 第一原理資料匯編 |
金蟲 (小有名氣)
木蟲 (正式寫手)
金蟲 (小有名氣)
木蟲 (正式寫手)
銀蟲 (小有名氣)
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