SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 37: Ruthenates
TT 37.12: Vortrag
Mittwoch, 29. März 2023, 18:00–18:15, HSZ 201
Imaging of compass-like control of the electronic structure in Sr3Ru2O7 — Masahiro Naritsuka1, Izidor Benedičič1, Luke Rhodes1, Carolina Marques1, Christopher Trainer1, Zhiwei Li2, Alexander Komarek2, and •Peter Wahl1 — 1SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9SS, United Kingdom — 2Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straβe 40, 01178 Dresden, Germany
Electronic nematicity results in a surprisingly strong symmetry-breaking reconstruction of electronic states without a significant lattice distortion. An enigmatic example of a nematic state is found in Sr3Ru2O7, where a large resistivity anisotropy is stabilized by external magnetic field. The direction of the anisotropy can be controlled by the in-plane component of the magnetic field. Recently, STM measurements have revealed symmetry breaking of the electronic structure at the surface of Sr3Ru2O7 even in zero magnetic field. Here, we use low-temperature scanning tunnelling microscopy to study the electronic structure in Sr3Ru2O7 in vector magnetic fields. We find that the electronic structure is strongly affected even by relatively small external field when applied in the crystallographic a-b-plane, and is evolving continuously as a function of in-plane field direction. Our result establishes compass-like control over the electronic structure in the surface layer of Sr3Ru2O7. We can rationalise the continuous evolution of the electronic structure with field direction through the interplay of magnetism and spin-orbit coupling.