High Pressure Neutron Diffraction on Quantum Materials

Sachith Dissanayake, Department of Physics, Duke University

Tuning phase transitions in magnetic systems using control parameters have been studied extensively because of various exotic phenomena they show near the Quantum Critical Point (QCP). High pressure in particular is a very versatile tool to control a system from transitioning from one phase to another. High pressure research in quantum materials is a challenging but highly progressing area in many of the facilities. Combination of high pressure with other control parameters such as magnetic field or chemical substitutions can realize more exotic phases in these materials. In this talk, I will present single crystal high pressure neutron diffraction studies performed on several materials; pressure induced superconductors such as MnP and CePtSi₂, topological superconductor MoTe₂ and magnetic systems C₉H₁₈N₂CuBr₄ (DLCB), HgCr₂Se₄ and LaCrGe₃. I will also talk about some of the recent developments of pressure cells for high pressure neutron scattering at ORNL.

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