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dc.contributor.authorKreisel, A.
dc.contributor.authorMarques, C. A.
dc.contributor.authorRhodes, L. C.
dc.contributor.authorKong, X.
dc.contributor.authorBerlijn, T.
dc.contributor.authorFittipaldi, R.
dc.contributor.authorGranata, V.
dc.contributor.authorVecchione, A.
dc.contributor.authorWahl, P.
dc.contributor.authorHirschfeld, P. J.
dc.identifier.citationKreisel , A , Marques , C A , Rhodes , L C , Kong , X , Berlijn , T , Fittipaldi , R , Granata , V , Vecchione , A , Wahl , P & Hirschfeld , P J 2021 , ' Quasi-particle interference of the van Hove singularity in Sr 2 RuO 4 ' , npj Quantum Materials , vol. 6 , 100 .
dc.identifier.otherPURE: 273020649
dc.identifier.otherPURE UUID: 2c7759ef-e522-418a-a5b2-2abac271ad42
dc.identifier.otherJisc: bcdf72e8457a4172be27a784a9daded1
dc.identifier.otherJisc: bcdf72e8457a4172be27a784a9daded1
dc.identifier.otherpublisher-id: s41535-021-00401-x
dc.identifier.othermanuscript: 401
dc.identifier.otherORCID: /0000-0002-8635-1519/work/105318368
dc.identifier.otherORCID: /0000-0003-2468-4059/work/105318600
dc.identifier.otherScopus: 85120944579
dc.identifier.otherWOS: 000728553500002
dc.descriptionFunding: J.H. was supported by the US Department of Energy under Grant no. DE-FG02-05ER46236. C.A.M. and P.W. acknowledge funding from EPSRC through EP/L015110/1 and EP/R031924/1, respectively, and L.C.R. from the Royal Commission for the Exhibition of 1851.en
dc.description.abstractThe single-layered ruthenate Sr2RuO4 is one of the most enigmatic unconventional superconductors. While for many years it was thought to be the best candidate for a chiral p-wave superconducting ground state, desirable for topological quantum computations, recent experiments suggest a singlet state, ruling out the original p-wave scenario. The superconductivity as well as the properties of the multi-layered compounds of the ruthenate perovskites are strongly influenced by a van Hove singularity in proximity of the Fermi energy. Tiny structural distortions move the van Hove singularity across the Fermi energy with dramatic consequences for the physical properties. Here, we determine the electronic structure of the van Hove singularity in the surface layer of Sr2RuO4 by quasi-particle interference imaging. We trace its dispersion and demonstrate from a model calculation accounting for the full vacuum overlap of the wave functions that its detection is facilitated through the octahedral rotations in the surface layer.
dc.relation.ispartofnpj Quantum Materialsen
dc.rightsCopyright © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleQuasi-particle interference of the van Hove singularity in Sr2RuO4en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Condensed Matter Physicsen
dc.description.statusPeer revieweden

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