Network model for higher-order topological phases

Physical review. B./Physical review. B, vol. 103

Abstract

The network model is a powerful tool in the study of localization-delocalization transitions and has been used to describe a variety of topological systems without crystalline symmetry. Here, the authors show that network models can also realize topological phases protected by point-group symmetries. The latter lead to the formation of a higher-order topological phase characterized by midgap modes present at the corners of the system.

Authors 5

1. Hui Liu

   Leibniz Institute for Solid State and Materials Research · Complexity, Topology and Dynamics in Quantum Matter

   Affiliation as printed

   IFW Dresden and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtzstrasse 20, 01069 Dresden, Germany

2. Selma Franca

   Leibniz Institute for Solid State and Materials Research · Complexity, Topology and Dynamics in Quantum Matter

   Affiliation as printed

   IFW Dresden and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtzstrasse 20, 01069 Dresden, Germany

3. Ali G. Moghaddam

   Leibniz Institute for Solid State and Materials Research · Complexity, Topology and Dynamics in Quantum Matter · Institute for Advanced Studies in Basic Sciences

   Affiliation as printed

   Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran

   IFW Dresden and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtzstrasse 20, 01069 Dresden, Germany

   Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Science (IASBS), Zanjan 45137-66731, Iran

4. Fabian Hassler Aachen JARA-Institute for Quantum Information

   RWTH Aachen University

   Affiliation as printed

   JARA-Institute for Quantum Information, RWTH Aachen University, 52056 Aachen, Germany

5. Ion Cosma Fulga

   Leibniz Institute for Solid State and Materials Research · Complexity, Topology and Dynamics in Quantum Matter

   Affiliation as printed

   IFW Dresden and Würzburg-Dresden Cluster of Excellence ct.qmat, Helmholtzstrasse 20, 01069 Dresden, Germany