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Strong electronic interactions in quantum materials give rise to a plethora of novel emergent phenomena. In this talk, I will introduce the use of nitrogen-vacancy (NV) centers in diamond and boron-vacancy centers in layered hexagonal boron nitride (hBN) as a non-invasive and table-top quantum sensor to probe different aspects of static and dynamic phenomena of quantum matter at both ambient and high pressure environment. In particular, we will focus on two recent experiments from the group: (1) the diagnosis of low-energy dynamics such as critical fluctuations and vortex dynamics in layered high-Tc cuprate [1]; and (2) the imaging of pressure-induced magnetic phase transition in a CrTe/hBN heterostructure [2]. These results demonstrate how solid-state spin defects provide a uniquely versatile platform for exploring superconductivity and magnetism.

[1] arXiv:2502.04439 (2025)
[2] Nature Communications 16, 8162 (2025)