Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr4Ru3O10

Carolina de Almeida Marques*, Philip Murgatroyd, Rosalba Fittipaldi, Weronika Osmolska, Brendan Mark Edwards, Izidor Benedicic, Gesa-Roxanne Siemann, Luke C. Rhodes, Sebastian Buchberger, Masahiro Naritsuka, Edgar Abarca Morales, Daniel Robert Halliday, Craig Polley, Mats Leandersson, Masafumi Horio, Johan Chang, Raja Arumugam, Mariateresa Lettieri, Veronica Granata, Antonio VecchionePhil King*, Peter Wahl

*Corresponding author for this work

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Van Hove singularities (VHss) in the vicinity of the Fermi energy often play a dramatic role in the physics of strongly correlated electron materials. The divergence of the density of states generated by VHss can trigger the emergence of new phases such as superconductivity, ferromagnetism, metamagnetism, and density wave orders. A detailed understanding of the electronic structure of these VHss is therefore essential for an accurate description of such instabilities. Here, we study the low-energy electronic structure of the trilayer strontium ruthenate Sr4Ru3O10, identifying a rich hierarchy of VHss using angle-resolved photoemission spectroscopy and millikelvin scanning tunneling microscopy. Comparison of k-resolved electron spectroscopy and quasiparticle interference allows us to determine the structure of the VHss and demonstrate the crucial role of spin-orbit coupling in shaping them. We use this to develop a minimal model from which we identify a new mechanism for driving a field-induced Lifshitz transition in ferromagnetic metals.
Original languageEnglish
Article number35
Number of pages40
Journalnpj Quantum Materials
Publication statusPublished - 8 Apr 2024


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