Topological spin excitations in Harper-Heisenberg spin chains

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LADO, Jose L., Oded ZILBERBERG, 2019. Topological spin excitations in Harper-Heisenberg spin chains. In: Physical Review Research. American Physical Society. 1(3), 033009. eISSN 2643-1564. Available under: doi: 10.1103/PhysRevResearch.1.033009

@article{Lado2019Topol-54996, title={Topological spin excitations in Harper-Heisenberg spin chains}, year={2019}, doi={10.1103/PhysRevResearch.1.033009}, number={3}, volume={1}, journal={Physical Review Research}, author={Lado, Jose L. and Zilberberg, Oded}, note={Article Number: 033009} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:rights rdf:resource=""/> <dcterms:hasPart rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dcterms:available rdf:datatype="">2021-09-23T13:04:52Z</dcterms:available> <dc:contributor>Zilberberg, Oded</dc:contributor> <dspace:hasBitstream rdf:resource=""/> <dc:language>eng</dc:language> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:title>Topological spin excitations in Harper-Heisenberg spin chains</dcterms:title> <dc:date rdf:datatype="">2021-09-23T13:04:52Z</dc:date> <dc:rights>Attribution 4.0 International</dc:rights> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <bibo:uri rdf:resource=""/> <dc:creator>Zilberberg, Oded</dc:creator> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:issued>2019</dcterms:issued> <dc:contributor>Lado, Jose L.</dc:contributor> <dc:creator>Lado, Jose L.</dc:creator> <dcterms:abstract xml:lang="eng">Many-body spin systems represent a paradigmatic platform for the realization of emergent states of matter in a strongly interacting regime. Spin models are commonly studied in one-dimensional periodic chains, whose lattice constant is on the order of the interatomic distance. However, in cold atomic setups or functionalized twisted van der Waals heterostructures, long-range modulations of the spin physics can be engineered. Here we show that such superlattice modulations in a many-body spin Hamiltonian can give rise to observable topological boundary modes in the excitation spectrum of the spin chain. In the case of an XY spin-1/2 chain, these boundary modes stem from a mathematical correspondence with the chiral edge modes of a two-dimensional quantum Hall state. Our results show that the addition of many-body interactions does not close some of the topological gaps in the excitation spectrum, and the topological boundary modes visibly persist in the isotropic Heisenberg limit. These observations carry through when the spin moment is increased and a large-spin limit of the phenomenon is established. Our results show that such spin superlattices provide a promising route to observe many-body topological boundary effects in cold atomic setups and functionalized twisted van der Waals materials.</dcterms:abstract> </rdf:Description> </rdf:RDF>

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