Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 52: Nickelates and Other Complex Oxides
TT 52.6: Vortrag
Freitag, 21. März 2025, 10:45–11:00, H31
Designed cleaving planes in ruthenium dioxide for ARPES experiments — •Marieke Visscher1,2, Lea Richter1, Sebastian Buchberger2, Bruno Saika2, Andy Mackenzie1,2, and Phil King2 — 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany — 2Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, UK
Ruthenium dioxide has a complex band structure, underpinning a variety of phenomena including superconductivity under strain and a Dirac nodal line network. It has also been proposed as a candidate altermagnet, and although recent studies suggest it lacks the requisite magnetic order, it has been shown to host unusual spin-polarised states in its band structure. These phenomena motivate the need for more detailed studies into its electronic structure. Angle-resolved photoemission spectroscopy (ARPES) would be an ideal probe for this, but the three-dimensional structure of ruthenium dioxide makes it difficult to prepare atomically clean and flat surfaces with conventional methods. We have therefore investigated a fabrication method based on Focused Ion Beam (FIB) structuring to stimulate sample cleavage along desired crystallographic planes. With this method, we were able to obtain high quality surfaces, on which we performed ARPES measurements. With this new capability to tailor the sample cleavage, we significantly improve the quality of ARPES data from this compound, opening new perspectives for studying its low-energy electronic structure.
Keywords: ARPES; Ruthenium Dioxide