792 citations · 6.7k across the 69 of their papers we have counts for
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Ising Dirac fermions across a topological phase transition
Aoqian Zhang, Yaqi Ma, Yifei Jin +14
Dirac fermions have attracted significant interest due to their relativistic dispersions and close connections to topological physics, yet they are generally expected to be gapped…
Moire driven edge reconstruction in Fractional quantum anomalous Hall states
Feng Liu, Hoi Chun Po, Xue-Yang Song
We investigate fractional edge modes in moire fractional quantum anomalous Hall states, focusing on the role of lattice momentum conservation and umklapp scattering. For the hierar…
Visualizing the Localized Electrons of a Kagome Flat Band
Caiyun Chen, Jiangchang Zheng, Ruopeng Yu +4
Destructive interference between electron wavefunctions on the two-dimensional (2D) kagome lattice induces an electronic flat band, which could host a variety of interesting many-b…
Non-Abelian nonsymmorphic chiral symmetries
Yi Yang, Hoi Chun Po, Vincent Liu +3
The Hofstadter model exemplifies a large class of physical systems characterized by particles hopping on a lattice immersed in a gauge field. Recent advancements on various synthet…
Higher-Order Nonlinear Anomalous Hall Effects Induced by Berry Curvature Multipoles
Cheng-Ping Zhang, Xue-Jian Gao, Ying-Ming Xie +2
In recent years, it has been shown that Berry curvature monopoles and dipoles play essential roles in the anomalous Hall effect and the nonlinear Hall effect respectively. In this…
Topological Invariants of a Filling-Enforced Quantum Band Insulator
Abijith Krishnan, Ashvin Vishwanath, Hoi Chun Po
Traditional ionic/covalent compound insulators arise from a commensuration between electron count and system volume. On the other hand, conventional topological insulators, outside…
Symmetry indicators of band topology
Hoi Chun Po
Topological materials are quantum materials with nontrivial ground-state entanglement that are irremovable so long as certain rules, like invariance under symmetries and the existe…
XFe4Ge2 (X = Y, Lu) and Mn3Pt: Filling-enforced magnetic topological metals
Di Wang, Feng Tang, Hoi Chun Po +2
Magnetism, coupled with nontrivial band topology, can bring about many interesting and exotic phenomena, so that magnetic topological materials have attracted persistent research i…
Two-dimensional topological materials discovery by symmetry-indicator method
Di Wang, Feng Tang, Jialin Ji +4
Two-dimensional (2D) topological materials (TMs) have attracted tremendous attention due to the promise of revolutionary devices with non-dissipative electric or spin currents. Unf…
Towards ideal topological materials: Comprehensive database searches using symmetry indicators
Feng Tang, Hoi Chun Po, Ashvin Vishwanath +1
Topological materials (TMs) showcase intriguing physical properties defying expectations based on conventional materials, and hold promise for the development of devices with new f…
Topological Materials Discovery By Large-order symmetry indicators
Feng Tang, Hoi Chun Po, Ashvin Vishwanath +1
Crystalline symmetries play an important role in the classification of band structures, and the rich variety of spatial symmetries in solids leads to various topological crystallin…
Efficient Topological Materials Discovery Using Symmetry Indicators
Feng Tang, Hoi Chun Po, Ashvin Vishwanath +1
Although the richness of spatial symmetries has led to a rapidly expanding inventory of possible topological crystalline (TC) phases of electrons, physical realizations have been s…
Fragile Topology and Wannier Obstructions
Hoi Chun Po, Haruki Watanabe, Ashvin Vishwanath
Topological phases, such as Chern insulators, are defined in terms of additive indices that are stable against the addition of trivial degrees of freedom. Such topology presents an…
Phonon analogue of topological nodal semimetals
Hoi Chun Po, Yasaman Bahri, Ashvin Vishwanath
Topological band structures in electronic systems like topological insulators and semimetals give rise to highly unusual physical properties. Analogous topological effects have als…