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TT: Fachverband Tiefe Temperaturen

TT 9: Poster Session: Correlated Electrons

TT 9.27: Poster

Dienstag, 28. September 2021, 13:30–16:00, P

Anisotropic metamagnetism in trilayer ruthenate Sr₄Ru₃O₁₀ — •Izidor Benedičič¹, Masahiro Naritsuka¹, Luke C. Rhodes¹, Rosalba Fittipaldi², Veronica Granata³, Christopher Trainer¹, Antonio Vecchione², and Peter Wahl¹ — ¹School of Physics and Astronomy, University of St Andrews, North Haugh. St Andrews, Fife KY16 9SS, United Kingdom — ²CNR-SPIN, UOS Salerno, Via Giovanni Paolo II 132, I-84084, Fisciano, Italy — ³Dipartimento di Fisica "E.R.Caianiello", Universita di Salerno, I-84084 Fisciano, Salerno,Italy

The ground state of metamagnetic materials can be precisely controlled by application of magnetic field, making them exciting candidates for spintronic applications. In itinerant metamagnets, such as trilayer ruthenate Sr₄Ru₃O₁₀, understanding their electronic structure is crucial for successful manipulation and tuning of their magnetic properties. I will show measurements using quasiparticle interference imaging in a low temperature scanning tunneling microscope to study the electronic structure of Sr₄Ru₃O₁₀ in magnetic field. We find a strongly anisotropic response to the in-plane field, suggesting an unusually strong effect of the orthorhombic distortion on the electronic structure. Using DFT calculations, we can model the QPI signal and find the Fermi surface dominated by bands of spin-minority character, putting constraints on theories for the origin of the metamagnetic transition.