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Ferromagnetic helical nodal line and Kane-Mele spin-orbit coupling in kagome metal Fe3Sn2
Shiang Fang, Linda Ye, Madhav Prasad Ghimire +8
The two-dimensional kagome lattice hosts Dirac fermions at its Brillouin zone corners K and K', analogous to the honeycomb lattice. In the density functional theory electronic stru…
Massive Dirac fermions in a ferromagnetic kagome metal
Linda Ye, Mingu Kang, Junwei Liu +10
The kagome lattice is a two-dimensional network of corner-sharing triangles known as a platform for exotic quantum magnetic states. Theoretical work has predicted that the kagome l…
Van der Waals Stacking Induced Topological Phase Transition in Layered Ternary Transition Metal Chalcogenides
Junwei Liu, Hua Wang, Chen Fang +2
Novel materials with nontrivial electronic and photonic band topology are crucial for realizing novel devices with low power consumption and heat dissipation, and quantum computing…
Crystal Field Effect Induced Topological Crystalline Insulators In Monolayer IV-VI Semiconductors
Junwei Liu, Xiaofeng Qian, Liang Fu
Two-dimensional (2D) topological crystalline insulators (TCIs) were recently predicted in thin films of the SnTe class of IV-VI semiconductors, which can host metallic edge states…
Electrically Tunable Quantum Spin Hall State in Topological Crystalline Insulator Thin films
Junwei Liu, Liang Fu
Based on a combination of theory, band topology analysis and electronic structure calculations, we predict the (111) thin films of the SnTe class of three-dimensional (…
Weak Topological Insulators in PbTe/SnTe Superlattices
Gang Yang, Junwei Liu, Liang Fu +2
It is desirable to realize topological phases in artificial structures by engineering electronic band structures. In this paper, we investigate superlattice…
Surface States of Topological Crystalline Insulators in IV-VI Semiconductors
Junwei Liu, Wenhui Duan, Liang Fu
Topological crystalline insulators (TCI) are new topological phases of matter protected by crystal symmetry of solids. Recently, the first realization of TCI has been predicted and…
Topological Crystalline Insulators in the SnTe Material Class
Timothy H. Hsieh, Hsin Lin, Junwei Liu +3
Topological crystalline insulators are new states of matter in which the topological nature of electronic structures arises from crystal symmetries. Here we predict the first mater…