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Pressure Induced Structural Phase Transition in Actinide Mono-bismuthides: Ab Initio Calculations

机译:Actinide单铋的压力诱导结构相转变:AB Initio Calculation

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The structural and electronic properties of mono-bismuthides of Plutonium and Americium have been investigated using tight binding linear muffin-tin-orbital (TB-LMTO) method within the local density approximation (LDA). From present study with the help of total energy calculations it is found that PuBi and AmBi are stable in NaCl -type structure under ambient pressure. The structure stability of PuBi and AmBi changes under the application of pressure. We predict a structural phase transition from NaCl-type (B_(1-)phase) structure to CsCl-type (B_2-phase) structure for these phospides in the pressure range of 45 - 4.5 GPa for PuBi and AmBi respectively. The calculated equilibrium lattice parameters and bulk modulus are in good agreement with experimental and theoretical work.
机译:在局部密度近似(LDA)内使用紧密结合的线性松饼 - 轨道(TB-LMTO)方法,研究了钚和亚美亚美洲单铋和americured的结构和电子性质。从本研究借助总能量计算,发现Pubi和Ambi在环境压力下在NaCl型结构中稳定。压力施加下Pubi和AMBI变化的结构稳定性。我们预测来自NaCl型(B_(1-)相)结构的结构相转变为CSCL型(B_2相)结构,用于分别为PUBI和AMBI的45-4.5GPa的压力范围内的这些岩石化合物。计算出的平衡晶格参数和散装模量与实验和理论工作吻合良好。

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