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arXiv 1402.5002math-phcond-mat.dis-nnmath.MPmath.OA
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无序手征系统的非对易奇Chern数与拓扑相

Non-commutative odd Chern numbers and topological phases of disordered chiral systems

Emil Prodan, Hermann Schulz-Baldes

摘要:

证明了交叉积代数的高奇Chern特征标的奇指标定理。它推广了Noether-Gohberg-Krein指标定理。此外,还给出了相应的循环上循环的局部计算公式。当应用到非交换布里渊区,这允许定义拓扑不变量的凝聚态相位从手征酉(或全III对称)类在强无序和磁场的存在下,只要费米能级位于区域的安德森局域化。

英文摘要:

An odd index theorem for higher odd Chern characters of crossed product algebras is proved. It generalizes the Noether-Gohberg-Krein index theorem. Furthermore, a local formula for the associated cyclic cocycle is provided. When applied to the non-commutative Brillouin zone, this allows to define topological invariants for condensed matter phases from the chiral unitary (or AIII-symmetry) class in the presence of strong disorder and magnetic fields whenever the Fermi level lies in region of Anderson localization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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