磁场作用下的准一维石墨带结构及半填充时的库仑关联
Quasi-one dimensional graphite ribbon structures in presence of magnetic field and on-site Coulomb correlation at half-filling
摘要：
研究了库仑相互作用（$U$）和磁场（$\vec{B}$）对半填充准一维石墨带结构基态性质的影响。平均场Hartree-Fock近似被用来研究系统。为了理解石墨结构中的边界效应，我们将这些系统的结果与方形晶格带结构的结果进行了比较。通过研究态密度、Drude重量和电荷间隙，绘制了锯齿形和扶手椅形石墨带的$U-B$相图。
英文摘要：
We have presented the role of the Coulomb interaction ($U$) and the magnetic field ($\vec{B}$) on the ground state properties of the quasi-one dimensional graphite ribbon structures at half-filling. Mean field Hartree-Fock Approximation is used to study the systems. To understand the boundary effects in graphite structures, we have compared the results of these systems with those of the square lattice ribbon structures. Studying the density of states, the Drude weight and the charge gap, we have drawn the $U-B$ phase diagrams for the zigzag and the armchair graphite ribbons.
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