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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2501.14504 |
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| _version_ | 1866915371029626880 |
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| author | Dailledouze, Cassandra Hilberer, Antoine Schmidt, Martin Adam, Marie-Pierre Toraille, Loïc Ho, Kin On Forget, Anne Colson, Dorothée Loubeyre, Paul Roch, Jean-François |
| author_facet | Dailledouze, Cassandra Hilberer, Antoine Schmidt, Martin Adam, Marie-Pierre Toraille, Loïc Ho, Kin On Forget, Anne Colson, Dorothée Loubeyre, Paul Roch, Jean-François |
| contents | Pressure is a key parameter for tuning or revealing superconductivity in materials and compounds. Many measurements of superconducting phase transition temperatures have been conducted using diamond anvil cells (DACs), which provide a wide pressure range and enable concomitant microscopic structural characterization of the sample. However, the inherently small sample volumes in DACs complicate the unambiguous detection of the Meissner effect, the hallmark of superconductivity. Recently, the Meissner effect in superconductors within a DAC was successfully demonstrated using diamond nitrogen-vacancy (N-V) widefield magnetometry, a non-invasive optical technique. In this work, we show that N-V magnetometry can also map superconductivity with micrometer resolution. We apply this technique to a microcrystal of HgBa$_2$Ca$_2$Cu$_3$O$_{8+δ}$ (Hg-1223) mercury-based cuprate superconductor under 4 GPa of pressure. The method is capable to detect the magnetic field expulsion and heterogeneities in the sample, visible in a set of characteristic parameters as the local critical temperature $T_{c}$. Flux pinning zones are identified through flux trapping maps. This approach could enable detailed investigations of superconductivity of a broad range of materials under high-pressure conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14504 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Imaging the Meissner Effect and Flux Trapping of Superconductors under High Pressure using N-V Centers Dailledouze, Cassandra Hilberer, Antoine Schmidt, Martin Adam, Marie-Pierre Toraille, Loïc Ho, Kin On Forget, Anne Colson, Dorothée Loubeyre, Paul Roch, Jean-François Superconductivity Quantum Physics Pressure is a key parameter for tuning or revealing superconductivity in materials and compounds. Many measurements of superconducting phase transition temperatures have been conducted using diamond anvil cells (DACs), which provide a wide pressure range and enable concomitant microscopic structural characterization of the sample. However, the inherently small sample volumes in DACs complicate the unambiguous detection of the Meissner effect, the hallmark of superconductivity. Recently, the Meissner effect in superconductors within a DAC was successfully demonstrated using diamond nitrogen-vacancy (N-V) widefield magnetometry, a non-invasive optical technique. In this work, we show that N-V magnetometry can also map superconductivity with micrometer resolution. We apply this technique to a microcrystal of HgBa$_2$Ca$_2$Cu$_3$O$_{8+δ}$ (Hg-1223) mercury-based cuprate superconductor under 4 GPa of pressure. The method is capable to detect the magnetic field expulsion and heterogeneities in the sample, visible in a set of characteristic parameters as the local critical temperature $T_{c}$. Flux pinning zones are identified through flux trapping maps. This approach could enable detailed investigations of superconductivity of a broad range of materials under high-pressure conditions. |
| title | Imaging the Meissner Effect and Flux Trapping of Superconductors under High Pressure using N-V Centers |
| topic | Superconductivity Quantum Physics |
| url | https://arxiv.org/abs/2501.14504 |