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TT: Fachverband Tiefe Temperaturen

TT 37: Ruthenates

TT 37.13: Vortrag

Mittwoch, 29. März 2023, 18:15–18:30, HSZ 201

Optical study of domains and domain walls in Ca₃Ru₂O₇ as a function of temperature and uniaxial pressure tuning — •Simli Mishra¹, Fei Sun¹, Elena Gati¹, Hilary Noad¹, Andrew P Mackenzie^1,2, and Veronika Sunko^1,3 — ¹Max Planck Institute, Chemical Physics of Solids, 01187, Dresden, Germany — ²School of Physics and Astronomy, University of St. Andrews, St. Andrews, KY16 9SS, UK — ³Department of Physics, University of California, Berkeley, California, 94720, USA

Using optical methods to investigate a material is a powerful non-contact method to explore fundamental physics. In our experiment, we use optics as a versatile microscope to investigate birefringence as well as thermal transport with micron-scale spatial resolution. It can be combined with an in-situ controllable uniaxial pressure device, which has recently been shown to be a powerful tuning parameter to control lattice symmetries in quantum materials. In this contribution, we present the birefringence of an anisotropic material, Ca₃Ru₂O₇, which has structural domains at room temperature and can be tuned through a structural phase transition by lowering the temperature at ambient pressure. We will discuss the spatial evolution of its domains as a function of temperature and uniaxial pressure.