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McKelvey School of Engineering

Quantum Sensing at High Pressures

Monday, September 27 | 1:30 PM - 2:30 PM

Stephen F. & Camilla T. Brauer Hall, 12
6548 Forest Park Pkwy, St. Louis, MO 63112, USA

The nitrogen-vacancy (NV) center has emerged as a promising nanoscale quantum sensor for temperature, strain, electric and magnetic fields. By integrating NV centers directly into a diamond anvil cell (DAC) --- the workhorse of high pressure science --- we demonstrate the in situ imaging of both strain and magnetism inside the pressure chamber, up to ~50 GPa and for temperatures ranging from 20-340K. In addition to operating the NV in a DC-sensing modality, we also use it to perform temperature dependent magnetic noise spectroscopy of Gadolinium, directly observing the Curie transition via changes in the Johnson noise. In contrast to conventional probes at high pressure, the NV-DAC platform allows for diffraction-limited spatial resolution within the high pressure chamber. Time permitting, I will describe our recent effort on pushing the pressure limit of NV sensor up to megabar (100GPa), making it suitable for diagnosing high pressure and high temperature superconductivity.

Please note that for all in-person events, attendees must adhere to Washington University’s public health requirements, including the latest events and meetings protocol. Guests will be required to show a successful self-screening result and wear a mask at all times.

Event Type

Lectures & Presentations, Seminar/Colloquia

Schools

Arts & Sciences, McKelvey School of Engineering

Topic

Science & Technology

Website

https://imse.wustl.edu/

Department
Institute of Materials Science & Engineering
Hashtag

#IMSEseminar

Event Contact

Beth Gartin bgartin@wustl.edu

Speaker Information

Chong Zu is a new assistant professor at the Department of Physics, Washington University of St. Louis. He received his BS and PhD in physics from Tsinghua University and has been a postdoctoral scholar at University of California, Berkeley. His research lab employs solid-state spin defects (e.g. nitrogen-vacancy (NV) centers in diamond) for two overarching directions: (1) quantum-enhanced sensing, and (2) quantum simulation and computation.

PS. He is actively looking for enthusiastic students and researchers to join his lab! Please do not hesitate to contact us if you are interested in working together! Email address: zu [at) wustl.edu

 

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