螺旋位错晶格上弱拓扑绝缘体的体位错对应
The bulk-dislocation correspondence for weak topological insulators on screw-dislocated lattices
摘要:
已知$3$维的弱拓扑绝缘体沿螺旋位错具有拓扑保护的无隙模。本文用C*-代数K-理论的语言表述并证明了这一事实。证明是基于螺旋面的粗指数理论。
英文摘要:
A weak topological insulator in dimension $3$ is known to have a topologically protected gapless mode along the screw dislocation. In this paper we formulate and prove this fact with the language of C*-algebra K-theory. The proof is based on the coarse index theory of the helical surface.
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