Probing Vortex Dynamics in 2D Superconductors with Scanning Quantum Microscope
Magnetic dynamics at the nanoscale provide crucial insight into the behavior of superconductors. Using single-spin scanning quantum microscopy, we probe vortex dynamics in the two-dimensional superconductor NbSe_{2}. Our measurements reveal a disordered vortex glass phase that melts near the critical temperature and displays cooling-rate-dependent configurations. Surprisingly, magnetic noise persists well below T_{c}, with a strength that increases at lower temperatures-contrary to expectations. This behavior, detected via spin decoherence, points to an intrinsic origin driven by competition between supercurrent density and thermal fluctuations. Our results establish single-spin microscopy as a powerful platform for investigating fluctuations in 2D superconductors.
Authors
- Ruoming Peng (ORCID: https://orcid.org/0000-0003-0910-2866)
- Mathias S. Scheurer (ORCID: https://orcid.org/0000-0002-9439-5159)
- Rainer Stöhr (ORCID: https://orcid.org/0000-0002-3476-344X)
- Jörg Wrachtrup (ORCID: https://orcid.org/0000-0003-3328-9093)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- J. H. Smet (ORCID: https://orcid.org/0000-0002-4719-8873)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Sreehari Jayaram (ORCID: https://orcid.org/0000-0002-2828-2279)
- Marc Scheffler (ORCID: https://orcid.org/0000-0002-7044-7532)
- Malik Lenger
- Lucas V. Pupim (ORCID: https://orcid.org/0009-0004-6903-8629)
- Dong Zhao (ORCID: https://orcid.org/0000-0002-7753-7637)
Institutions
- University of Stuttgart (DE)
- Chinese Academy of Sciences (CN)
- National Institute for Materials Science (JP)
- Max Planck Institute for Solid State Research (DE)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-09-16
- DOI
- https://doi.org/10.1103/1fzm-pb1d
- Citations
- 5
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 6.29