6 papers
High second Chern number induced by long-range hopping in a four-dimensional Dirac model
Zheng-Rong Liu, Xiang Liu, Rui Chen +1
Four-dimensional (4D) topological systems provide a promising platform for exploring topological phenomena beyond three dimensions. So far, extensive recent studies on 4D topologic…
Topological surface altermagnets in SSH-stacked magnetic layers
Rui Chen, Bin Zhou, Dong-Hui Xu
Surface altermagnetism opens new avenues in spintronics by unlocking altermagnetic spin-splitting at the boundaries of conventional antiferromagnets, bypassing the strict symmetry…
Altermagnetism in quasicrystals
Rui Chen, Bin Zhou, Dong-Hui Xu
Altermagnets are a recently discovered class of magnetic materials that combine a collinear, zero-magnetization spin structure, characteristic of antiferromagnets, with spin-split…
Numerical calculation of the -space second Chern number in four dimensions
Xiang Liu, Xiao-Xia Yi, Zheng-Rong Liu +2
We propose an efficient numerical method to compute the -space second Chern number in four-dimensional (4D) topological systems. Our approach employs an adaptive mesh refinement…
Evaluation of real-space second Chern number using the kernel polynomial method
Rui Chen, Bin Zhou
We evaluate the real-space second Chern number of four-dimensional Chern insulators using the kernel polynomial method. Our calculations are performed on a four-dimensional system…
Five-dimensional Floquet topological semimetals with emergent Yang monopoles and linked Weyl surfaces
Zheng-Rong Liu, Rui Chen, Bin Zhou
Recently, Floquet topological matter has attracted significant attention for its potential to reveal novel topological phases inaccessible in static systems. In this paper, we inve…