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Topological Phase Transition in Quasi-One-Dimensional Bismuth Iodide Bi4I4
W. X. Zhao, M. Yang, X. Du +12
The exploration of topological quantum materials and topological phase transitions is at the forefront of modern condensed matter physics. Quasi-one-dimensional (quasi-1D) bismuth…
Visualization of Chiral Electronic Structure and Anomalous Optical Response in a Material with Chiral Charge Density Waves
H. F. Yang, K. Y. He, J. Koo +18
Chiral materials have attracted significant research interests as they exhibit intriguing physical properties, such as chiral optical response, spin-momentum locking and chiral ind…
Observation of non-trivial topological electronic structure of orthorhombic SnSe
H. J. Zheng, W. J. Shi, C. W. Wang +20
Topological electronic structures are key to the topological classification of quantum materials and play an important role in their physical properties and applications. Recently,…
Topological Phase Transition in a Magnetic Weyl Semimetal
D. F. Liu, Q. N. Xu, E. K. Liu +15
Topological Weyl semimetals (TWSs) are exotic crystals possessing emergent relativistic Weyl fermions connected by unique surface Fermi-arcs (SFAs) in their electronic structures.…
Direct observation of the spin-orbit coupling effect in Magnetic Weyl semimetal Co3Sn2S2
D. F. Liu, E. K. Liu, Q. N. Xu +14
The spin-orbit coupling (SOC) lifts the band degeneracy that plays a vital role in the search for different topological states, such as topological insulators (TIs) and topological…
Spectroscopic Signature for Local-moment Magnetism in van der Waals Ferromagnet FeGeTe
X. Xu, Y. W. Li, S. R. Duan +15
The van der Waals ferromagnet FeGeTe has recently attracted extensive research attention due to its intertwined magnetic, electronic and topological properties. Here, using…
Universal gapless Dirac cone and tunable topological states in (MnBiTe)(BiTe) heterostructures
Yong Hu, Lixuan Xu, Mengzhu Shi +11
In the newly discovered magnetic topological insulator MnBiTe, both axion insulator state and quantized anomalous Hall effect (QAHE) have been observed by tuning the magnet…
Persistent gapless surface states in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator
L. X. Xu, Y. H. Mao, H. Y. Wang +21
Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic a…
Magnetic Weyl Semimetal Phase in a Kagome Crystal
D. F. Liu, A. J. Liang, E. K. Liu +16
Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with…
Observation of the Type-II Weyl Semimetal Phase in MoTe2
J. Jiang, Z. K. Liu, Y. Sun +15
Topological Weyl semimetal (TWS), a new state of quantum matter, has sparked enormous research interest recently. Possessing unique Weyl fermions in the bulk and Fermi arcs on the…
Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
Z. K. Liu, B. Zhou, Z. J. Wang +9
Three-dimensional (3D) topological Dirac semimetals (TDSs) represent a novel state of quantum matter that can be viewed as '3D graphene'. In contrast to two-dimensional (2D) Dirac…