论文
当前位置:
Chinese
>
科学研究
>
论文
Family of third-order topological insulators from Su-Schrieffer-Heeger stacking
- 发表刊物：Physical Review B
- 摘要：We construct a family of chiral symmetry-protected third-order topological insulators by stacking
Su-Schrieffer-Heeger (SSH) chains and provide a unified topological characterization by a series of
Bott indices. Our approach is informed by the analytical solution of corner states for the model
Hamiltonians written as a summation of the extended SSH model along three orthogonal directions.
By utilizing the generalized Pauli matrices, an enumeration of the constructed model Hamiltonians
generates ten distinct models, including the well-studied three-dimensional Benalcazar-Bernevig
Hughes model. By performing a boundary projection analysis for the ten models, we find that
certain surfaces and hinges of the systems can exhibit, respectively, nontrivial second-order and first
order topology in the phase of the third-order topological insulators. Furthermore, we analyze the
phase diagram for one of the predicted models and reveal a rich set of topological phases, including
the third-order topological insulators, second-order weak topological insulators, and second-order
nodal semimetals.
- 卷号：111
- 期号：3
- 页面范围：035115
- 是否译文：否
- 发表时间：2025-01-15
