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- W4385261350 abstract "The Fermi surface symmetric mass generation (SMG) is an intrinsically interaction-driven mechanism that opens an excitation gap on the Fermi surface without invoking symmetry-breaking or topological order. We explore this phenomenon within a bilayer square lattice model of spin-1/2 fermions, where the system can be tuned from a metallic Fermi liquid phase to a strongly-interacting SMG insulator phase by an inter-layer spin-spin interaction. The SMG insulator preserves all symmetries and has no mean-field interpretation at the single-particle level. It is characterized by zeros in the fermion Green's function, which encapsulate the same Fermi volume in momentum space as the original Fermi surface, a feature mandated by the Luttinger theorem. Utilizing both numerical and field-theoretical methods, we provide compelling evidence for these Green's function zeros across both strong and weak coupling regimes of the SMG phase. Our findings highlight the robustness of the zero Fermi surface, which offers promising avenues for experimental identification of SMG insulators through spectroscopy experiments despite potential spectral broadening from noise or dissipation." @default.
- W4385261350 created "2023-07-26" @default.
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- W4385261350 date "2023-07-23" @default.
- W4385261350 modified "2023-10-18" @default.
- W4385261350 title "Green's Function Zeros in Fermi Surface Symmetric Mass Generation" @default.
- W4385261350 doi "https://doi.org/10.48550/arxiv.2307.12223" @default.
- W4385261350 hasPublicationYear "2023" @default.
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