5 papers
Giant-exchange-driven Vectorial Control of a Minimal Topological Magnet in Eu3In2As4
Haonan Chen, Xunkai Duan, Guangyi Wang +13
The interplay between magnetism and band topology provides a route to controlling quantum states of matter, yet its realization in materials is often constrained by weak exchange c…
Symmetry Criterion for Van Hove Criticality at Non-Time-Reversal-Invariant Momenta
Min-Quan Kuang, Hua-Yu Li
At non-time-reversal-invariant momenta (non-TRIMs), time-reversal symmetry does not constrain the linear term of the band dispersion. Whether vanishes is therefore deter…
Type-I and Type-II Saddle Points and a Topological Flat Band in a Bi-Pyrochlore Superconductor CsBi2
Yusei Morita, Yongkai Li, Yu-Hao Wei +12
The divergence of the electron density of states (DOS) plays an important role in enhancing many-body interactions and inducing various quantum phases in low-dimensional systems. H…
Directional Criticality and Higher-Order Flatness: Designing Van Hove Singularities in Three Dimensions
Hua-Yu Li, Hengxin Tan, Hao-Yu Zhu +2
Van Hove singularities (VHSs) play a pivotal role in driving correlated electronic phenomena. Traditional classifications focus only on critical points where the band gradient vani…
Defect Engineering for Stabilizing Magnetic and Topological Properties in Mn(Bi1-xSbx)2Te4
Haonan Chen, Jiayu Wang, Huayao Li +18
MnBi2Te4 is a versatile platform for exploring diverse topological quantum states, yet its potential is hampered by intrinsic antisite defects. While Sb substitution has been emplo…