Superconductivity in Compositionally-Complex Cuprates with the YBa$_2$Cu$_3$O$_{7-x}$ Structure
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910337316421632 |
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| author | Raghavan, Aditya Arndt, Nathan Morales-Colón, Nayelie Wennen, Eli Wolfe, Megan Gandin, Carolina Oliveira Nelson, Kade Nowak, Robert Dillon, Sam Sahebkar, Keon Need, Ryan F. |
| author_facet | Raghavan, Aditya Arndt, Nathan Morales-Colón, Nayelie Wennen, Eli Wolfe, Megan Gandin, Carolina Oliveira Nelson, Kade Nowak, Robert Dillon, Sam Sahebkar, Keon Need, Ryan F. |
| contents | High-temperature superconductivity is reported in a series of compositionally-complex cuprates with varying degrees of size and spin disorder. Three compositions of Y-site alloyed YBa$_2$Cu$_3$O$_{7-x}$, i.e., (5Y)BCO, were prepared using solid-state methods with different sets of rare earth ions on the Y-site. Synchrotron X-ray diffraction and energy-dispersive X-ray spectroscopy confirm these samples have high phase-purity and homogeneous mixing of the Y-site elements. The superconducting phase transition was probed using electrical resistivity and AC magnetometry measurements, which reveal the transition temperature, T$_C$, is greater than 91 K for all series when near optimal oxygen doping. Importantly, these T$_C$ values are only $\approx$1$\%$ suppressed relative to pure YBCO (T$_C$ = 93 K). This result highlights the robustness of pairing in the YBCO structure to specific types of disorder. In addition, the chemical flexibility of compositionally-complex cuprates allows spin and lattice disorder to be decoupled to a degree not previously possible in high-temperature superconductors. This feature makes compositionally-complex cuprates a uniquely well-suited materials platform for studying proposed pairing interactions in cuprates. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2309_12535 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Superconductivity in Compositionally-Complex Cuprates with the YBa$_2$Cu$_3$O$_{7-x}$ Structure Raghavan, Aditya Arndt, Nathan Morales-Colón, Nayelie Wennen, Eli Wolfe, Megan Gandin, Carolina Oliveira Nelson, Kade Nowak, Robert Dillon, Sam Sahebkar, Keon Need, Ryan F. Superconductivity Strongly Correlated Electrons High-temperature superconductivity is reported in a series of compositionally-complex cuprates with varying degrees of size and spin disorder. Three compositions of Y-site alloyed YBa$_2$Cu$_3$O$_{7-x}$, i.e., (5Y)BCO, were prepared using solid-state methods with different sets of rare earth ions on the Y-site. Synchrotron X-ray diffraction and energy-dispersive X-ray spectroscopy confirm these samples have high phase-purity and homogeneous mixing of the Y-site elements. The superconducting phase transition was probed using electrical resistivity and AC magnetometry measurements, which reveal the transition temperature, T$_C$, is greater than 91 K for all series when near optimal oxygen doping. Importantly, these T$_C$ values are only $\approx$1$\%$ suppressed relative to pure YBCO (T$_C$ = 93 K). This result highlights the robustness of pairing in the YBCO structure to specific types of disorder. In addition, the chemical flexibility of compositionally-complex cuprates allows spin and lattice disorder to be decoupled to a degree not previously possible in high-temperature superconductors. This feature makes compositionally-complex cuprates a uniquely well-suited materials platform for studying proposed pairing interactions in cuprates. |
| title | Superconductivity in Compositionally-Complex Cuprates with the YBa$_2$Cu$_3$O$_{7-x}$ Structure |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2309.12535 |