Self-Consistent Mean-Field Theory for Interacting Electrons in Three-Dimensional Deformable Lattice
Self-Consistent Mean-Field Theory for Interacting Electrons in Three-Dimensional Deformable Lattice
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三维可变形晶格中相互作用电子的自洽平均场理论
DOI：
10.1143/jpsj.56.4477
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发表时间：
1987
影响因子：
1.7
通讯作者：
Y. Shinozuka
中科院分区：
文献类型：
--
作者：
Y. Shinozuka
研究了具有短程电子-电子 (e-e) 斥力 U 、位点对角电子-晶格 (e-L) 相互作用 S 和一半未扰动电子带宽 T 的三维多电子系统的基态特性。由于系统被认为是关于向上或向下自旋电子的有效势并经典地处理晶格的随机四组分合金，因此可以计算任何参数值的基态性质：T、U、S和电子数。通过获得T-U-S三角形中的相图，我们讨论了各种可能的相、局部自旋和电荷密度、相变、绝缘相的带隙宽度和结构变化。还讨论了半填充电子情况和非半填充情况的差异以及电子-空穴对称性以及 e-e 和 e-L 相互作用在金属-绝缘体转变中的不同作用。
The ground state properties are investigated of a three-dimensional many-electron system with short range electron-electron (e-e) repulsion U , site diagonal electron-lattice (e-L) interaction S and half of the unperturbed electronic band width T . Being the system considered as a random four-component alloy with respect to the effective potential for spin up or down electrons and treating the lattice classically, it is possible to calculate ground state properties for any values of parameters: T , U , S and the electron number, With obtained phase diagrams in the T – U – S triangle, we discuss a variety of possible phases, local spin- and charge-densities, phase transitions, band gap width of insulating phase and structural change. The difference in the half-filled electron case and non-half-filled cases is also discussed in connection with the electron-hole symmetry and the different role of e-e and e-L interactions in metal-insulator transition.