Low-field all-optical detection of superconductivity using NV nanodiamonds

Omkar Dhungel; Saravanan Sengottuvel; Mariusz Mrozek; Till Lenz; Nir Bar-Gill; Adam M. Wojciechowski; Arne Wickenbrock; Dmitry Budker

Low-field all-optical detection of superconductivity using NV nanodiamonds

Superconductivity 2025-10-15 v1 Materials Science

Authors: Omkar Dhungel , Saravanan Sengottuvel , Mariusz Mrozek , Till Lenz , Nir Bar-Gill , Adam M. Wojciechowski , Arne Wickenbrock , Dmitry Budker

View on arXiv ↗ PDF ↗

Abstract

Nitrogen-vacancy centers in nanodiamond offer a microwave-free, noninvasive platform for probing superconductors via near zero-field cross-relaxation magnetometry. We demonstrate this by depositing nanodiamonds on YBCO thin films to measure critical parameters: transition temperature and penetration field. This method leverages nanodiamond fluorescence modulation as a result of magnetic field variation with 1mT amplitude to observe the Meissner effect and field scans to measure the penetration field. The approach is minimally invasive and can be applied to superconducting samples with rough surfaces, facilitating the study of flux vortices and critical phenomena in complex geometries.

Keywords

superconductivity NV center nanodiamond optical detection Meissner effect

Cite

@article{arxiv.2510.11920,
  title  = {Low-field all-optical detection of superconductivity using NV nanodiamonds},
  author = {Omkar Dhungel and Saravanan Sengottuvel and Mariusz Mrozek and Till Lenz and Nir Bar-Gill and Adam M. Wojciechowski and Arne Wickenbrock and Dmitry Budker},
  journal= {arXiv preprint arXiv:2510.11920},
  year   = {2025}
}

Comments

8 pages and 5 figures

Low-field all-optical detection of superconductivity using NV nanodiamonds

Abstract

Keywords

Cite

Comments

Related papers