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理學院
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學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73905
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CuB2O4晶體在第一原理的研究
(
2019
)
王俊凱
;
Wang, Chun-Kai
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研究CuB2O4反鐵磁性材料在第一原理中的能帶架構以及材料特性。 CuB2O4在第一原理中,使用六個單元的方式呈現週期性的結構分布,在這個晶格中a=11.357、c=5.542 Å, k-mesh使用4x4x4, nbands為400 並且使用VASP GGA+U的方法,其中Cu(A)&Cu(B)的U分別為U1=6.4eV, U2=7.0eV。 在計算中,我們發現CuB2O4的density of state(DOS)在導帶的地方會出現兩個非常明顯的尖點。一個是由Cu(A)&O(1)組成,另外一個則是由Cu(B)&O(2)&O(3)&O(4)所貢獻,因此我們希望可以分析出兩者的不同。
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