Abstract
The exploration of novel emergent materials and quantum matters with intriguing physical phenomena and functionalities is essential in modern condensed matter sciences. High pressure synthesis technique is one of the most powerful tools to realise novel functional materials. In order to unraveling the mechanisms of their exotic physical phenomena, it is fundamental to examine the crystal structures and their evolution to obtain critical insights into the intertwined relationship between lattice, charge, orbital, spin degrees of freedom and the material properties. With utilising x-ray and neutron diffraction techniques and extracted structural information, one can derive detailed insights of materials such as charge distribution, orbital ordering, or spin arrangement. The observed structural changes are connected with their underlying symmetry breaking, using a systematic approach to explore structural instabilities in crystalline materials by analyzing symmetry-adapted modes and correlate to the exotic physical phenomena. In this talk, the techniques of high pressure synthesis, symmetry analysis and structure examinations will be discussed.