Systematic construction of tight-binding Hamiltonians for topological insulators and superconductors

D.-L. Deng; S.-T. Wang; L.-M. Duan

doi:10.1103/PhysRevB.89.075126

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Systematic construction of tight-binding Hamiltonians for topological insulators and superconductors

D.-L. Deng, S.-T. Wang, L.-M. Duan

DOI 10.1103/PhysRevB.89.075126 · Physical Review B

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Abstract

A remarkable discovery in recent years is that there exist various kinds of topological insulators and superconductors characterized by a periodic table according to the system symmetry and dimensionality. To physically realize these peculiar phases and study their properties, a critical step is to construct experimentally relevant Hamiltonians that support these topological phases. We propose a general and systematic method based on the quaternion algebra to construct the tight-binding Hamiltonians for all the three-dimensional topological phases in the periodic table characterized by arbitrary integer topological invariants, which include the spin-singlet and the spin-triplet topological superconductors, the Hopf, and the chiral topological insulators as particular examples. For each class, we calculate the corresponding topological invariants through both geometric analysis and numerical simulation.