论文标题
淋巴结循环半法中对角线障碍对拓扑表面状态的离域化
Delocalization of topological surface states by diagonal disorder in nodal loop semimetals
论文作者
论文摘要
安德森对角线障碍对Weyl节点环半学的拓扑表面（``Drumhead'）状态的影响得到了解决。由于对角线障碍会破坏手性对称性，因此无法定义绕组数。被视为扰动，弱随机电势将半学的清洁指数局部的鼓头状态混合在一起，从而产生了两种效果：（i）表面状态的代数衰减成批量； （ii）由于退化升高而扩大了开放系统表面状态的低能密度。这种行为持续到越来越多的混乱，直到关键障碍$ w_ {c} $的批量半学到金属过渡。在$ w_ {c} $上方，表面状态与散装状态杂交并扩展到大体中。
The effect of Anderson diagonal disorder on the topological surface (``drumhead'') states of a Weyl nodal loop semimetal is addressed. Since diagonal disorder breaks chiral symmetry, a winding number cannot be defined. Seen as a perturbation, the weak random potential mixes the clean exponentially localized drumhead states of the semimetal, thereby producing two effects: (i) the algebraic decay of the surface states into the bulk; (ii) a broadening of the low energy density of surface states of the open system due to degeneracy lifting. This behavior persists with increasing disorder, up to the bulk semimetal-to-metal transition at the critical disorder $W_{c}$. Above $W_{c}$, the surface states hybridize with bulk states and become extended into the bulk.
