Journal
SCIENCE
Volume 366, Issue 6471, Pages 1355-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaw4278
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Funding
- JST CREST [JPMJCR19T5]
- KAKENHI from the Japan Society for the Promotion of Science (JSPS) [15H02106, 15H03688, 15KK0160, 18H01177, 18H05227, 18K13492, 18K18727, 19H00649]
- Japan Society for the Promotion of Science (JSPS) [15H05852, 19H05824]
- Mitsubishi Foundation
- Hong Kong RGC [GRF/14300418, GRF/14300419, GRF/14301316, ECS/24304617, GRF/14304618, GRF/14304419]
- CUHK start-up grant
- Grants-in-Aid for Scientific Research [15KK0160, 18K18727, 19H00649, 18H01177, 18K13492] Funding Source: KAKEN
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Pressure is a clean, continuous, and systematic tuning parameter among the competing ground states in strongly correlated electron systems such as superconductivity and magnetism. However, owing to the restricted access to samples enclosed in high-pressure devices, compatible magnetic field sensors with sufficient sensitivity are rare. We used nitrogen vacancy centers in diamond as a spatially resolved vector field sensor for material research under pressure at cryogenic temperatures. Using a single crystal of BaFe2(As0.59P0.41)(2) as a benchmark, we extracted the superconducting transition temperature, the local magnetic field profile in the Meissner state, and the critical fields. The method developed in this work offers a distinct tool for probing and understanding a range of quantum many-body systems.
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