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February 17, 20234:00 pm – 5:00 pm (CDT)

Quantum Sensing of Quantum Materials

Speaker:

Chunhui Du (UCSD)

Host:

Joaquin Rodriguez Nieva

Location:

Address:

Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

Exploring new class of quantum materials with advanced magnetic and electronic properties has been a central focus of modern condensed matter physics over the past decades. The success of these efforts relies simultaneously on advances in theory, material synthesis, and development of new, sensitive metrology tools capable of diagnosing the key material properties at the nanoscale. Nitrogen-vacancy (NV) centers, optically active atomic spin defects in diamond, are naturally relevant in this context due to their excellent quantum coherence, unprecedented spatial and field sensitivity, and remarkable functionality over broad experimental conditions. Serving as a local probe of multiple degrees of freedom, NV centers are ideally posed to investigate the fundamental correlations between microscopic spin, charge, and thermal behaviors in condensed matter systems. In this talk, I will present our recent work on using NV centers to perform quantum sensing of emergent quantum materials. Specifically, we have utilized NV centers to visualize the exotic spin properties of topological magnetic materials and antiferromagnetic insulators, revealing the fundamental spin transport and dynamic physics at the nanoscale. Taking advantage of coherent coupling between NV centers and nanomagnetic devices, we achieved electric field induced coherent control of NV centers, promoting the role of NV centers at the forefront research of quantum science and technologies. Lastly, I will briefly discuss our ongoing efforts on exploring 2D quantum sensing technologies using emergent color centers beyond NVs.

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