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TT: Fachverband Tiefe Temperaturen
TT 37: Ruthenates
TT 37.13: Talk
Wednesday, March 29, 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 Mackenzie1,2, and Veronika Sunko1,3 — 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.