论文标题
在2D手性统一类中的金属绝缘体过渡
Metal-insulator transition in a 2D system of chiral unitary class
论文作者
论文摘要
我们通过结合有限尺寸的缩放，传输，状态的密度和多重差异研究，对Anderson Metal-Metal-Metal-Metal-Metal-Metal-Metultrator跃迁（MIT）进行数值研究。结果与Sigma-Model Renoralization Group理论一致，其中MIT是由涡流的增殖驱动的。我们确定相图，并在MIT的临界线上找到几个参数的明显非宇宙性，这与分析预测的慢速重归于MIT的最终固定点。本地化长度指数$ν$估计为$ν= 1.55 \ pm 0.10 $。
We perform a numerical investigation of Anderson metal-insulator transition (MIT) in a twodimensional system of chiral symmetry class AIII by combining finite-size scaling, transport, density of states, and multifractality studies. The results are in agreement with the sigma-model renormalization-group theory, where MIT is driven by proliferation of vortices. We determine the phase diagram and find an apparent non-universality of several parameters on the critical line of MIT, which is consistent with the analytically predicted slow renormalization towards the ultimate fixed point of the MIT. The localization-length exponent $ν$ is estimated as $ν= 1.55 \pm 0.10$.
