23 citations · 75 across the 12 of their papers we have counts for
12 papers
Second-order topological insulator induced by compensated altermagnetism without bulk spin splitting
Lizhou Liu, Qing-Feng Sun, Ying-Tao Zhang
We theoretically demonstrate a second-order topological insulating phase induced by compensated altermagnetism, while keeping the bulk gap unchanged, in a two-dimensional topologic…
Quantum anomalous Hall effect with tunable Chern numbers induced by d-wave sublattice-staggered altermagnetism
Lizhou Liu, Qing-Feng Sun
We construct a minimal spinful tight-binding model on a square lattice, where a -wave sublattice-staggered altermagnetism drives the quantum anomalous Hall effect. Here the exch…
Engineering Two-Dimensional Hybrid-Order Topological Insulators via Trilayer Coupling
Lizhou Liu, Cheng-Ming Miao, Qing-Feng Sun
We propose an interlayer-engineering scheme to realize a two-dimensional hybrid-order topological insulator, characterized by the coexistence of first-order and second-order topolo…
Engineering chiral-induced spin selectivity in an artificial topological quantum well
Lizhou Liu, Peng-Yi Liu, Tian-Yi Zhang +1
Chiral-induced spin selectivity (CISS) is a striking phenomenon in which spin-unpolarized electrons become spin-polarized after traversing a chiral medium. Theoretical studies have…
Tunable two-dimensional Dirac-Weyl semimetal phase induced by altermagnetism
Lizhou Liu, Qing-Feng Sun, Ying-Tao Zhang
We demonstrate a tunable Dirac-Weyl semimetal phase in two dimensions, realized by introducing in-plane d-wave altermagnetism into a Dirac system. This phase hosts both a central D…
Two-Dimensional Higher-Order Topological Metals
Lizhou Liu, Cheng-Ming Miao, Qing-Feng Sun +1
We investigate the energy band structure and energy levels of graphene with staggered intrinsic spin-orbit coupling and in-plane Zeeman fields. Our study demonstrates that staggere…
Two-dimensional Dirac semimetals with tunable edge states
Lizhou Liu, Cheng-Ming Miao, Qing-Feng Sun +1
We theoretically propose a design for two-dimensional Dirac semimetals using a bilayer-modified Bernevig-Hughes-Zhang (BHZ) model. By introducing new sites into the BHZ model, we e…
Quantum spin Hall effect in bilayer honeycomb lattices with C-type antiferromagnetic order
Lizhou Liu, Cheng-Ming Miao, Qing-Feng Sun +1
We propose a scheme to realize time-reversal symmetry-broken quantum spin Hall insulators using bilayer honeycomb lattices, combining intrinsic spin-orbit coupling, C-type antiferr…
Two-dimensional higher-order Weyl semimetals
Lizhou Liu, Qing-Feng Sun, Ying-Tao Zhang
We propose a theoretical scheme to realize two-dimensional higher-order Weyl semimetals using a trilayer topological insulator film coupled with a d-wave altermagnet. Our results s…
Engineering second-order topological insulators via coupling two first-order topological insulators
Lizhou Liu, Jiaqi An, Yafei Ren +3
We theoretically investigate the engineering of two-dimensional second-order topological insulators with corner states by coupling two first-order topological insulators. We find t…
Interlayer Coupling Induced Topological Phase Transition to Higher Order
Lizhou Liu, Jiaqi An, Yafei Ren +3
We theoretically find that the second-order topological insulator, i.e., corner states, can be engineered by coupling two copies of two-dimensional topological insul…
The General Principle behind Magnetization-induced Second-Order Topological Corner States in the Kane-Mele Model
Cheng-Ming Miao, Lizhou Liu, Yu-Hao Wan +2
We propose a general principle for realizing second-order topological corner states in the modified Kane-Mele model with magnetization. It is demonstrated that the sign of the edge…