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Construction and classification of crystalline topological superconductor and insulators in three-dimensional interacting fermion systems
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The natural existence of crystalline symmetry in real materials manifests the importance of understanding crystalline symmetry-protected topological (SPT) phases, especially for interacting systems. In this paper, we systematically construct and classify all the crystalline topological superconductors and insulators in three-dimensional (3D) interacting fermion systems using the novel concept of topological crystal. The corresponding higher-order topological surface theory can also be systematically studied via higher-order bulk-boundary correspondence. In particular, we discover an intriguing fact that almost all topological crystals with nontrivial 2D block states are intrinsically interacting topological phases that cannot be realized in any free-fermion systems. Moreover, the crystalline equivalence principle for 3D interacting fermionic systems is also verified, with an additional subtle "twist" on the spin of fermions.
Forward citations
Cited by 2 Pith papers
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Interacting Electronic Topology of Nonlocal Crystals
An exactly solvable 1D model with infinite-range Hatsugai-Kohmoto interactions realizes a topological phase with a size-independent inversion eigenvalue -1 and an odd quantized charge pump, impossible in local models.
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Discrete Shift and Polarization from Response to Symmetry Defects in Interacting Topological Phases
DMRG simulations of an interacting Hofstadter model show quantized defect-bound charges, yielding discrete shift 1/2 and polarization 1/2 in the Chern phase, and shift 1 in the CDW phase.
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