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dc.contributor.authorEfremov, Dmitry V.
dc.contributor.authorShtyk, Alex
dc.contributor.authorRost, Andreas W.
dc.contributor.authorChamon, Claudio
dc.contributor.authorMackenzie, Andrew P.
dc.contributor.authorBetouras, Joseph J.
dc.identifier.citationEfremov , D V , Shtyk , A , Rost , A W , Chamon , C , Mackenzie , A P & Betouras , J J 2019 , ' Multicritical Fermi surface topological transitions ' , Physical Review Letters , vol. 123 , no. 20 , 207202 , pp. 1-6 .
dc.identifier.otherPURE: 263441998
dc.identifier.otherPURE UUID: f625a908-48d6-4822-9bc5-0075dfe75308
dc.identifier.othercrossref: 10.1103/PhysRevLett.123.207202
dc.identifier.otherScopus: 85075062938
dc.identifier.otherWOS: 000496583500010
dc.descriptionFunding: UK EPSRC Grants No. EP/P002811/1 (JJB) and No. EP/P024564/1 (AWR); Royal Society (JJB and CC); DOE Grant No. DE-FG02-06ER46316 (CC).en
dc.description.abstractA wide variety of complex phases in quantum materials are driven by electron-electron interactions, which are enhanced through density of states peaks. A well-known example occurs at van Hove singularities where the Fermi surface undergoes a topological transition. Here we show that higher order singularities, where multiple disconnected leaves of Fermi surface touch all at once, naturally occur at points of high symmetry in the Brillouin zone. Such multicritical singularities can lead to stronger divergences in the density of states than canonical van Hove singularities, and critically boost the formation of complex quantum phases via interactions. As a concrete example of the power of these Fermi surface topological transitions, we demonstrate how they can be used in the analysis of experimental data on Sr3Ru2O7. Understanding the related mechanisms opens up new avenues in material design of complex quantum phases.
dc.relation.ispartofPhysical Review Lettersen
dc.rightsCopyright © 2019 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleMulticritical Fermi surface topological transitionsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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