تقرير
Optimizing superconductivity: from cuprates via nickelates to palladates
| العنوان: | Optimizing superconductivity: from cuprates via nickelates to palladates |
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| المؤلفون: | Kitatani, Motoharu, Si, Liang, Worm, Paul, Tomczak, Jan M., Arita, Ryotaro, Held, Karsten |
| المصدر: | Phys. Rev. Lett. 130, 166002 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Motivated by cuprate and nickelate superconductors, we perform a comprehensive study of the superconducting instability in the single-band Hubbard model. We calculate the spectrum and superconducting transition temperature $T_{\rm c}$ as a function of filling and Coulomb interaction for a range of hopping parameters, using the dynamical vertex approximation. We find the sweet spot for high $T_{\rm c}$ to be at intermediate coupling, moderate Fermi surface warping, and low hole doping. Combining these results with first principles calculations, neither nickelates nor cuprates are close to this optimum within the single-band description. Instead, we identify some palladates, notably RbSr$_2$PdO$_3$ and $A^{\prime}_2$PdO$_2$Cl$_2$ ($A^{\prime}$=Ba$_{0.5}$La$_{0.5}$), to be virtually optimal, while others, such as NdPdO$_2$, are too weakly correlated. Comment: 8+16 pages, 5+18 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.130.166002 |
| URL الوصول: | http://arxiv.org/abs/2207.14038 |
| رقم الأكسشن: | edsarx.2207.14038 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.130.166002 |
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