作者: Shuichi Murakami , Ryo Takahashi , Yutaro Tanaka
DOI: 10.1103/PHYSREVRESEARCH.2.013300
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摘要: This paper establishes a general proof of bulk-hinge correspondence in inversion-symmetric insulators. By continuously introducing cut to three dimensional second order topological insulator, the resulting spectral flow reflects parities bulk eigenstates, necessarily leading band inversions through this cutting procedure. As result, it is shown that two slab second-order insulator always two-dimensional Chern insulator.