Transition to the Haldane phase driven by electron-electron correlations.

ABSTRACT: One of the most famous quantum systems with topological properties, the spin [Formula: see text] antiferromagnetic Heisenberg chain, is well-known to display exotic [Formula: see text] edge states. However, this spin model has not been analyzed from the more general perspective of strongly correlated systems varying the electron-electron interaction strength. Here, we report the investigation of the emergence of the Haldane edge in a system of interacting electrons - the two-orbital Hubbard model-with increasing repulsion strength U and Hund interaction J_H. We show that interactions not only form the magnetic moments but also form a topologically nontrivial fermionic many-body ground-state with zero-energy edge states. Specifically, upon increasing the strength of the Hubbard re

SUBMITTER: Jazdzewska A 

PROVIDER: S-EPMC10740019 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature