Calculation of positron states and annihilation in solids: A density-gradient-correction scheme
Calculation of positron states and annihilation in solids: A density-gradient-correction scheme
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DOI：
10.1103/physrevb.53.16201
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发表时间：
1996-06-15
影响因子：
3.7
通讯作者：
Nieminen, RM
中科院分区：
文献类型：
--
作者：
Barbiellini, B;Puska, MJ;Nieminen, RM
固体中正电子-电子关联效应的广义梯度修正法[B. Barbiellini等人，Phys. Rev. B 51，7341（1995）]应用于几个测试用例。正电子寿命，能量，和动量分布的湮灭电子-正电子对被认为是。与实验的比较表明，系统的改进的预测能力的理论相比，局域密度近似的正电子态和湮没特性的结果。
The generalized gradient correction method for positron-electron correlation effects in solids [B. Barbiellini et al., Phys. Rev. B 51, 7341 (1995)] is applied in several test cases. The positron lifetime, energetics, and momentum distribution of the annihilating electron-positron pairs are considered. The comparison with experiments shows systematic improvement in the predictive power of the theory compared to the local-density approximation results for positron states and annihilation characteristics.