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Designer flat bands in quasi-one-dimensional atomic lattices

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Huda, Md Nurul
dc.contributor.author Shawulienu, Kezilebieke
dc.contributor.author Liljeroth, Peter
dc.date.accessioned 2021-01-25T10:19:08Z
dc.date.available 2021-01-25T10:19:08Z
dc.date.issued 2020-12-28
dc.identifier.citation Huda , M N , Shawulienu , K & Liljeroth , P 2020 , ' Designer flat bands in quasi-one-dimensional atomic lattices ' , PHYSICAL REVIEW RESEARCH , vol. 2 , no. 4 , 043426 . https://doi.org/10.1103/PhysRevResearch.2.043426 en
dc.identifier.issn 2643-1564
dc.identifier.other PURE UUID: ef7f2013-a3a2-4064-b5ee-a9d3568a4b00
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/ef7f2013-a3a2-4064-b5ee-a9d3568a4b00
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/54479218/Huda_Designer.PhysRevResearch.2.043426.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/102283
dc.description | openaire: EC/H2020/788185/EU//E-DESIGN
dc.description.abstract Certain lattices with specific geometries have one or more spectral bands that are strictly flat, i.e., the electron energy is independent of the momentum. This can occur robustly irrespective of the specific couplings between the lattices sites due to the lattice symmetry, or it can result from fine-tuned couplings between the lattice sites. While the theoretical picture behind flat electronic bands is well developed, experimental realization of these lattices has proven challenging. Utilizing scanning tunneling microscopy (STM) and spectroscopy (STS), we manipulate individual vacancies in a chlorine monolayer on Cu(100) to construct various atomically precise one-dimensional (1D) lattices with engineered flat bands. We realize experimentally both gapped and gapless flat band systems with single or multiple flat bands. We also demonstrate tunability of the energy of the flat bands and how they can be switched on and off by breaking and restoring the symmetry of the lattice geometry. The experimental findingsare corroborated by tight-binding calculations. Our results constitute the first experimental realizations of engineered flat bands in a 1D solid-state system and pave the way toward the construction of, e.g., topological flat band systems and experimental tests of flat-band-assisted superconductivity in a fully controlled system. en
dc.format.extent 9
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Physical Society
dc.relation info:eu-repo/grantAgreement/EC/H2020/788185/EU//E-DESIGN
dc.relation.ispartofseries PHYSICAL REVIEW RESEARCH en
dc.relation.ispartofseries Volume 2, issue 4 en
dc.rights openAccess en
dc.title Designer flat bands in quasi-one-dimensional atomic lattices en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Atomic Scale Physics
dc.contributor.department Department of Applied Physics en
dc.identifier.urn URN:NBN:fi:aalto-202101251593
dc.identifier.doi 10.1103/PhysRevResearch.2.043426
dc.type.version publishedVersion

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