Regensburg 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 52: Nickelates and Other Complex Oxides
TT 52.5: Talk
Friday, March 21, 2025, 10:30–10:45, H31
A versatile microscope for simultaneous optical and thermodynamic investigation of Ca3Ru2O7 — •Simli Mishra1, Elena Gati1, Fei Sun1, Hilary Noad1, Dmitry Sokolov1, Andrew Mackenzie1,2, and Veronika Sunko1,3 — 1Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2School of Physics and Astronomy, University of St. Andrews, St. Andrews, UK — 3Department of Physics, University of California, Berkeley, California, USA
Ruddlesden-Popper-type ruthenates are well-known for hosting intriguing phenomena, including unconventional superconductivity, metal-insulator transitions, spin-orbit coupling, and strange metal behavior. Among these, the bilayer ruthenate Ca3Ru2O7 is a polar metal that exhibits strong electronic correlations. It undergoes an antiferromagnetic transition at 56 K and a first-order structural phase transition at 48 K at ambient pressure.
In our experiments, we utilize a versatile, optics-based microscope with high spatial resolution, to investigate quantum materials. The setup has been integrated with a uniaxial pressure cell that enables pressure to be used as both a tuning parameter and a thermodynamic probe. Using this technique, we simultaneously measure the optical reflectivity and the elastocaloric effect to understand the behavior of Ca3Ru2O7 as a function of temperature and uniaxial pressure.
Keywords: ruthenates; optical technique; elastocaloric effect; uniaxial pressure; strong correlations