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I05-ARPES	Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr4Ru3O10 Carolina A. Marques , Philip A. E. Murgatroyd , Rosalba Fittipaldi , Weronika Osmolska , Brendan Edwards , Izidor Benedičič , Gesa-R. Siemann , Luke C. Rhodes , Sebastian Buchberger , Masahiro Naritsuka , Edgar Abarca-Morales , Daniel Halliday , Craig Polley , Mats Leandersson , Masafumi Horio , Johan Chang , Raja Arumugam , Mariateresa Lettieri , Veronica Granata , Antonio Vecchione , Phil D. C. King , Peter Wahl Npj Quantum Materials 9 DOI: 10.1038/s41535-024-00645-3 Diamond Proposal Number(s): [28412] Open Access Show Abstract ▼ Abstract: 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 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 mechanism for driving a field-induced Lifshitz transition in ferromagnetic metals.	Apr 2024

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I05-ARPES

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