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Z2 Topological Invariant

已有 2428 次阅读 2017-9-3 20:25 |个人分类:Topological|系统分类:科研笔记| Topological, Invariant

The strong topological index:

(−1)ν0Γ×σM1×σM2×σM3×σL1×σL2×σL3×σA


The other three weak topological indices (νk, k = 1, 2, 3):

(−1)ν1M1×σM2×σL1×σL2

(−1)ν2M2×σM3×σL2×σL3

(−1)ν3L1×σL2×σL3×σA



WCC’s

ν0 = [(z0+z1) mod 2] = [(x0+x1) mod 2] = [(y0+y1) mod 2]

ν1 = x1;   ν2 = y1;   ν3 = z1




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