Imaging the Meissner effect in pressurized bilayer nickelate with integrated multi-parameter quantum sensor
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2025-07-04 |
| Journal | National Science Review |
| Authors | J. S. Wen, Yue Xu, Gang Wang, Zhi He, Yang Chen |
| Institutions | Czech Academy of Sciences, Institute of Physics, Hefei University of Technology |
| Citations | 4 |
Abstract
Section titled âAbstractâABSTRACT Recent reports on the signatures of high-temperature superconductivity with a critical temperature (Tc) close to 80 K have triggered great research interest and extensive follow-up studies. Although zero resistance has been successfully achieved under improved hydrostatic pressure conditions, the Meissner effect of La3Ni2O7-δ under high pressure remains controversial. Here, using shallow nitrogen-vacancy centers implanted on the culet of diamond anvils as in situ quantum sensors, we observe compelling evidence for the Meissner effect in polycrystalline bilayer nickelate samples: magnetic field expulsion during both field-cooling and field-warming processes. In particular, we explore the multi-parameter measurement capacity of the diamond quantum sensors to extract the weak demagnetization signal of La3Ni2O7-δ. The correlated measurements of Raman spectra and magnetic imaging indicate an incomplete structural transformation related to the displacement of oxygen ions emerging in the non-superconducting region. Our work clarifies the controversy about the Meissner effect of La3Ni2O7-δ and contributes to the development of quantum sensing of weak signals under high-pressure conditions.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 2019 - Superconductivity in an infinite-layer nickelate [Crossref]
- 2020 - Phase diagram and superconducting dome of infinite-layer Nd1âxSrxNiO2 thin films [Crossref]
- 2022 - Superconductivity in infinite-layer nickelate La1âxCaxNiO2 thin films [Crossref]
- 2023 - Critical role of hydrogen for superconductivity in nickelates [Crossref]
- 2020 - Phase diagram of infinite layer praseodymium nickelate Pr1âxSrxNiO2 thin films [Crossref]
- 2022 - Pressure-induced monotonic enhancement of Tc to over 30âK in superconducting Pr0.82Sr0.18NiO2 thin films [Crossref]
- 2023 - Signatures of superconductivity near 80âK in a nickelate under high pressure [Crossref]
- 2023 - Correlated electronic structure of La3Ni2O7 under pressure [Crossref]
- 2024 - Structural phase transition, sÂą-wave pairing, and magnetic stripe order in bilayered superconductor La3Ni2O7 under pressure [Crossref]
- 2024 - Electronic correlations and partial gap in the bilayer nickelate La3Ni2O7 [Crossref]