论文标题
内核多项式方法向安德森过渡以无序$β$ -graphyne
Kernel polynomial method to Anderson transition in disordered $β$-graphyne
论文作者
论文摘要
通过可变的力矩内核多项式方法，我们分析了受Anderson疾病的$β$ graphyne表的定位特性。为了检测定位过渡，我们关注状态典型密度的缩放行为。我们发现发生了金属 - 绝缘体的转变，而关键混乱的强度是带宽的顺序，这与单参数缩放理论相反，表明对于无限的二维系统，所有电子状态均定位为Anderson障碍的任意强度。作为其特定的定位属性，可以合理地预测在零温度下将存在$β$ - graphyne的直流电导率。
By means of variable moment kernel polynomial method, we analyze the localization properties of $β$-graphyne sheet subjected to the Anderson disorder. To detect the localization transition we focus on the scaling behavior of the normalized typical density of states. We find that there takes place a metal-insulator transition and the critical disorder strength is of the order of the bandwidth, which is contrary to the one-parameter scaling theory stating that for infinite two dimensional systems, all the electronic states are localized for an arbitrary strength of the Anderson disorder. As its particular localization properties, it is reasonable to predict there will exist dc conductivity for $β$-graphyne at zero temperature.
