Journal
PHYSICAL REVIEW B
Volume 98, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.98.165101
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Funding
- Deutsche Forschungsgemeinschaft through the Emmy Noether program [KA 3360/2-1]
- CRC/Transregio 183 [B01]
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We present a functional renormalization-group approach to interacting topological Green's function invariants with a focus on the nature of transitions. The method is applied to chiral symmetric fermion chains in the Mott limit that can be driven into a Haldane phase. We explicitly show that the transition to this phase is accompanied by a zero of the fermion Green's function. Our results for the phase boundary are quantitatively benchmarked against density matrix renormalization-group data.
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