Meanwhile, on a bipartite lattice consisting of two equal sublattices A and B, the sublattice symmetry assigns ± 1 forA-sites andB-sites, respectively, and therefore can be represented asS = diag(1A, − 1B) (see Fig.1). If hopping occurs only from one sublattice to th...
对于sublattice symmetry，第一行关系要求系统只能有两个泡利矩阵，第三个泡利矩阵便给出S。此时自旋（赝...
Here, we reveal the spatial nature of sublattice symmetry and show that this assertion holds only if the periodicity of primitive unit cells agrees with that of the sublattice labeling. In cases where the periodicity does not agree, sublattice symmetry is represented as a glide reflection in ...
到此,你大概可以理解为什么拓扑里面需要系统的对称性了吧。而无论是sublattice symmetry还是PH symmetry,都是symmetry,能够带来不同的拓扑类型。 以上,喵 [1] Michael Levin and Ady Stern, 2009, Phys. Rev. Lett. 103, 196803. [2] B. Swingle, M. Barkeshli, J. McGreevy, and T. Senthil, 2011, ...
Influence of the sublattice symmetry on the band structure of a MgSiN2crystalInfluence of the sublattice symmetry on the band structure of a MgSiN2crystalTheoretical or Mathematical/ Brillouin zonescrystal symmetrydensity functional theorymagnesium compoundssilicon compounds/ sublattice symmetryband...
Intact Dirac Cones at Broken Sublattice Symmetry: Photoemission Study of Graphene on Ni and Co extended graphene, it is well established by breaking translational symmetry by confinement and by breaking sublattice symmetry by interaction with a substrate... A Varykhalov,D Marchenko,J Sánchez-Barrig...
Symmetry breaking perturbations in an electronically conducting medium are known to produce Friedel oscillations in various physical quantities of an otherwise pristine material. Here we show in a mathematically transparent fashion that Friedel oscillations in graphene have a strong sublattice asymmetry. As...
5-FOLD SYMMETRYThe formation of the icosahedral quasicrystalline phase in the Al-Cr-Fe system has been investigated by X-ray diffraction as a function of the CrxFe1–x, composition of the transition-metal (TM) quasisublattice. An optimal range was found around x = 0·6, where the ...
Theory of color symmetry for periodic and quasiperiodic crystals (up to permutation) the number of colourings of the triangular lattice where one colour occupies a similarity (hence triangular) sublattice of of index ... Lifshitz,Ron - 《Reviews of Modern Physics》 被引量: 111发表: 1997年 A...
Comparing crystal structures with symmetry and geometry. npj Comput. Mater. 7, 164 (2021). ADS Google Scholar Download references Acknowledgements We thank financial support from the National Science Fund for Distinguished Young Scholars (no. 22025202), National Key Research and Development Program ...