1. All-Optical and Microwave-Free Detection of Meissner Screening using Nitrogen-Vacancy Centers in Diamond
- Author
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Paone, D., Pinto, D., Kim, G., Feng, L., Kim, M-J., Stöhr, R., Singha, A., Kaiser, S., Logvenov, G., Keimer, B., Wrachtrup, J., and Kern, K.
- Subjects
Condensed Matter - Superconductivity ,Quantum Physics - Abstract
Microscopic studies on thin film superconductors play an important role for probing non-equilibrium phase transitions and revealing dynamics at the nanoscale. However, magnetic sensors with nanometer scale spatial and picosecond temporal resolution are essential for exploring these. Here, we present an all-optical, microwave-free method, that utilizes the negatively charged nitrogen-vacancy (NV) center in diamond as a non-invasive quantum sensor and enables the spatial detection of the Meissner state in a superconducting thin film. We place an NV implanted diamond membrane on a superconducting LSCO thin film. The strong B-field dependence of the NV photoluminescence (PL) allows us to investigate the Meissner screening in LSCO under an externally applied magnetic field in a non-resonant manner.
- Published
- 2021
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