Open AccessCALCULATING THE POSITRON – ELECTRON CORRELATION ENERGY IN ZnO WITH THE MODIFIED SINGLE WAVE FUNCTION FOR POSITRON
Author(s) -
Tạo Văn Châu,
Lang Hoa Trinh,
Tuan Anh Nguyen,
Le Hoang Chien,
Linda Nguyen
Publication year - 2011
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v14i4.2029
Subject(s) - positron , electron , physics , wave function , atomic physics , superposition principle , monte carlo method , variational monte carlo , nuclear physics , quantum mechanics , mathematics , statistics , superconductivity , hubbard model
The ZnO – positron system is studied and its positron – electron correlation energy is estimated in its ground state. The positron binds with the outer shell electrons of Zinc and Oxigen to form the pseudo ZnO – positron molecule before it anihilates with one of these electrons. In this work, the single wave function for positron is modified according to the principle of linear superposition, and by using Variational Quantum Monte – Carlo method (VQMC) the correlation energy of this system is estimated with the value Ec e-p = - 9.3 ± 1.1 eV. It turns out that the value is closer to results estimated by other methods than the value that we had done before.