论文类型：期刊论文
第一作者：Xiao-Hong Pan
通讯作者：Xin Liu
合写作者：Chao-Xing Liu,Li Chen,Kai-Jie Yang,Gang Xu
发表刊物：Physical Review Letters
收录刊物：SCI
学科门类：理学
一级学科：物理学
文献类型：J
卷号：123
期号：15
页面范围：156801
ISSN号：0031-9007
发表时间：2019-10-10
影响因子：8.385
摘要：We propose a realization of the lattice-symmetry-assisted second-order topological superconductors with corner Majorana zero modes (MZM) based on two-dimensional topological insulators (2DTI). The lattice symmetry can naturally lead to the anisotropic coupling of edge states along different directions to the in-plane magnetic field and conventional s-wave pairings, thus leading to a single MZM located at the corners for various lattice patterns. In particular, we focus on the 2DTI with D3d lattice symmetry and found different types of gap opening for the edge states along the armchair and zigzag edges in a broad range of parameters. As a consequence, a single MZM exists at the corner between the zigzag and armchair edges, and is robust against weakly broken lattice symmetry. We propose to realize such corner MZMs in a variety of polygon patterns, such as triangles and quadrilaterals. We further show their potentials in building the Majorana network through constructing the Majorana Y junction under an in-plane magnetic field.
发布期刊链接：https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.156801