Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr4Ru3O10
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 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.
Citation
de Almeida Marques , C , Murgatroyd , P , Fittipaldi , R , Osmolska , W , Edwards , B M , Benedicic , I , Siemann , G-R , Rhodes , L C , Buchberger , S , Naritsuka , M , Abarca Morales , E , Halliday , D R , Polley , C , Leandersson , M , Horio , M , Chang , J , Arumugam , R , Lettieri , M , Granata , V , Vecchione , A , King , P & Wahl , P 2024 , ' Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr 4 Ru 3 O 10 ' , npj Quantum Materials , vol. 9 , 35 . https://doi.org/10.1038/s41535-024-00645-3
Publication
npj Quantum Materials
Status
Peer reviewed
ISSN
2397-4648Type
Journal article
Description
Funding: CAM, MN and PW gratefully acknowledge funding from the Engineering and Physical Sciences Research Council through EP/R031924/1 and EP/S005005/1, IB through the International Max Planck Research School for Chemistry and Physics of Quantum Materials and LCR from a fellowship from the Royal Commission of the Exhibition of 1851. RA, RF and AV thank the EU’s Horizon 2020 research and innovation program under Grant Agreement No. 964398 (SUPERGATE).Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.