Coupled wire model of symmetric Majorana surfaces of topological superconductors
Coupled wire model of symmetric Majorana surfaces of topological superconductors
复制标题
拓扑超导体对称马约拉纳面的耦合线模型
DOI：
10.1103/physrevb.94.165142
复制
发表时间：
2015
影响因子：
3.7
通讯作者：
J. C. Teo
中科院分区：
文献类型：
--
作者：
S. Sahoo;Zhao Zhang;J. C. Teo
在自由费米子图像中，拓扑超导体（TSC）等受保护的拓扑相的分类是众所周知的。最近，人们观察到，包括多体相互作用，保持对称性产生了新的表面相，打破了分类方案。对这种相的微观理论的完整理解是缺失的。本文试图了解的相互作用，引起这些阶段的情况下，三维TSC。作者建立了一个耦合线模型的无间隙表面的哈密顿量，并表明，在本文中构建的时间反演对称两体相互作用的增加，打开了能隙的频谱。他们还表明，这种间隙表面相是拓扑非平凡的，并分类不同的非相互作用的情况下相比。
Classification of symmetry-protected topological phases such as the topological superconductor (TSC) is well known in the free fermion picture. Recently, it was observed that including many-body interactions that preserves symmetry gives rise to novel surface phases and breaks down the classification scheme. A complete understanding of the microscopic theory for such phases is missing. This paper is an attempt to understand the interaction that gives rise to these phases in the case of the three-dimensional TSC. The authors build a coupled wire model Hamiltonian for the gapless surface and show that the addition of a time-reversal symmetric two-body interaction, constructed in this paper, opens an energy gap in the spectrum. They also show this gapped surface phase is topologically nontrivial and is classified differently compared to the noninteracting case.