Fabrication of microstructured devices of the unconventional superconductor CeCoIn5 for investigations of isolated grain boundaries
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866918324137361408 |
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| author | Mishra, Sanu Thomas, Sean M. Mccabe, Rod Bauer, Eric D. Ronning, Filip |
| author_facet | Mishra, Sanu Thomas, Sean M. Mccabe, Rod Bauer, Eric D. Ronning, Filip |
| contents | Grain boundaries are critical for determining the functionality of polycrystalline materials. Here we present on the structural $\&$ transport properties of grain boundaries in the unconventional superconductor CeCoIn$_5$. We provide a detailed recipe for the fabrication of isolated grain boundary devices from of as-grown polycrystalline samples of CeCoIn$_5$. Electron backscattered diffraction imaging of polycrystalline CeCoIn$_5$ samples reveals an abundance of $90^\circ$ misorientation grain boundaries suggesting a preferential nucleation of CeCoIn$_5$ grains with 90$^\circ$ misorientation over a random distribution of grain orientations. Transport measurements across grain boundary devices establish coherence of superconductivity and allows us to establish a lower bound on the critical current density for the grain boundaries. Our work opens new possibilities for fabrication of quantum devices such as Josephson-junctions out of bulk unconventional superconducting materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_22238 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fabrication of microstructured devices of the unconventional superconductor CeCoIn5 for investigations of isolated grain boundaries Mishra, Sanu Thomas, Sean M. Mccabe, Rod Bauer, Eric D. Ronning, Filip Superconductivity Strongly Correlated Electrons Grain boundaries are critical for determining the functionality of polycrystalline materials. Here we present on the structural $\&$ transport properties of grain boundaries in the unconventional superconductor CeCoIn$_5$. We provide a detailed recipe for the fabrication of isolated grain boundary devices from of as-grown polycrystalline samples of CeCoIn$_5$. Electron backscattered diffraction imaging of polycrystalline CeCoIn$_5$ samples reveals an abundance of $90^\circ$ misorientation grain boundaries suggesting a preferential nucleation of CeCoIn$_5$ grains with 90$^\circ$ misorientation over a random distribution of grain orientations. Transport measurements across grain boundary devices establish coherence of superconductivity and allows us to establish a lower bound on the critical current density for the grain boundaries. Our work opens new possibilities for fabrication of quantum devices such as Josephson-junctions out of bulk unconventional superconducting materials. |
| title | Fabrication of microstructured devices of the unconventional superconductor CeCoIn5 for investigations of isolated grain boundaries |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.22238 |