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高压下TATB压缩性质的LDA和GGA比较研究 被引量:2

Crystal structure of the TATB crystal under high pressure
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摘要 本文采用第一性原理密度泛函理论,结合平面波赝势方法,采用局域密度近似(LDA)和广义梯度近似(GGA)两种方法计算了TATB晶体在高压(0~7GPa)压缩下的结构和物理性质,并与实验数据进行了比较.详细讨论了TATB晶体的晶体结构和分子构型随压力的变化. Using density functional theory, within the local density approxinamtion (LDA) and the generalized gradient approximation (GGA), we have studied the structural properties of crystal TATB under hydrostatic pressure up to 7 GPa. The P-V curve of LDA calculations is in good agreement with the experimental data. In contrast, GGA calculations predicted a larger lattice constant and unit cell volume than experiment under lower pressure and predicted a smaller ones under higher pressure.
出处 《原子与分子物理学报》 CAS CSCD 北大核心 2007年第2期291-297,共7页 Journal of Atomic and Molecular Physics
基金 国家自然科学基金(40474033 10376024) 地震科学联合基金(B07002) 高等学校博士学科点专项基金(20050613017)
关键词 TATB 高压 晶体结构 密度泛函理论 TATB, high pressure, crystal structure,density functional theory
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参考文献28

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