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• W2899239509 abstract "A 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 ${mathrm{Sr}}_{3}{mathrm{Ru}}_{2}{mathrm{O}}_{7}$. Understanding the related mechanisms opens up new avenues in material design of complex quantum phases." @default.
• W2899239509 created "2018-11-09" @default.
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• W2899239509 date "2019-11-13" @default.
• W2899239509 modified "2023-10-17" @default.
• W2899239509 title "Multicritical Fermi Surface Topological Transitions" @default.
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• W2899239509 doi "https://doi.org/10.1103/physrevlett.123.207202" @default.
• W2899239509 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31809068" @default.
• W2899239509 hasPublicationYear "2019" @default.
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