Strain-induced enhancement of $T_c$ in infinite-layer Pr${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ films

Abstract

The mechanism of unconventional superconductivity in correlated materials remains a great challenge in condensed matter physics. The recent discovery of superconductivity in infinite-layer nickelates, as analog to high-Tc cuprates, has opened a new route to tackle this challenge. By growing 8 nm Pr0.8Sr0.2NiO2 films on the (LaAlO3)0.3(Sr2AlTaO6)0.7 substrate, we successfully raise the transition temperature Tc from 9 K in the widely studied SrTiO3-substrated nickelates into 15 K. By combining x-ray absorption spectroscopy with the first-principles and many-body simulations, we find a positive correlation between Tc and the pre-edge peak intensity, which can be attributed to the hybridization between Ni and O orbitals induced by the strain. Our result suggests that structural engineering can further enhance unconventional superconductivity, and the charge-transfer property plays a crucial role in the pairing strength.

arXiv comment8 pages, 4 figures

References in corpus (38)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Correlated Electrons in High Temperature Superconductors
• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• Superconducting Dome in Nd${}_{1-x}$Sr${}_x$NiO${}_2$ Infinite Layer Films
• Electronic structure of the parent compound of superconducting infinite-layer nickelates
• Phase diagram and superconducting dome of infinite-layer $\mathrm{N}{\mathrm{d}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{r}}_{\mathrm{x}}\mathrm{Ni}{\mathrm{O}}_2$ thin films
• Electron-phonon coupling reflecting dynamic charge inhomogeneity in copper-oxide superconductors
• Infinite Layer LaNiO(2): Ni(1+)is not Cu(2+)
• Superconductivity in a quintuple-layer square-planar nickelate
• A superconducting praseodymium nickelate with infinite layer structure
• Self-doped Mott insulator for parent compounds of nickelate superconductors
• The critical nature of the Ni spin state in doped NdNiO${}_2$
• Robust $d_{x^2-y^2}$-wave superconductivity of infinite-layer nickelates
• Model construction and a possibility of cuprate-like pairing in a new d9 nickelate superconductor (Nd,Sr)NiO2
• Superconductivity in the Hubbard model and its interplay with charge stripes and next-nearest hopping t'
• Polaron in t-J model
• Nickelate superconductors -- a renaissance of the one-band Hubbard model
• Phase Diagram of Infinite Layer Praseodymium Nickelate Pr${}_{1-x}$Sr${}_x$NiO${}_2$ Thin Films
• Rapid change of superconductivity and electron-phonon coupling through 19% doping in Bi2212
• Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains
• Character of the "normal state" of the nickelate superconductors
• Pressure-induced monotonic enhancement of Tc to over 30 K in the superconducting Pr0.82Sr0.18NiO2 thin films
• Role of $4f$ states in infinite-layer NdNiO${}_2$
• Ground State Phase Diagram of the $t$-$t^{\prime }$-$J$ model
• Electronic structure of rare-earth infinite-layer ReNiO2 (Re=La, Nd)
• Scaling of the transition temperature of hole-doped cuprate superconductors with the charge-transfer energy
• Orbital and Spin Character of Doped Carriers in Infinite-Layer Nickelates
• Electronic Structure Trends Across the Rare-Earth Series in Superconducting Infinite Layer Nickelates
• Relationship between the parent charge transfer gap and maximum transition temperature in cuprates
• Strain-Engineering Mott-Insulating La${}_2$CuO${}_4$
• Isotope Effect in the Superfluid Density of HTS Cuprates: Stripes, Pseudogap and Impurities
• Impact of Cation Stoichiometry on the Crystalline Structure and Superconductivity in Nickelates
• Hole superconductivity in infinite-layer nickelates
• Effect of epitaxial strain on the electronic structure and magnetic correlations in infinite-layer (Nd,Sr)NiO${}_2$
• Proposal to improve Ni-based superconductors via enhanced charge transfer
• Magnetic excitations in infinite-layer nickelates

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• Unraveling p-type and n-type interfaces in Superconducting Infinite-Layer Nickelate thin films
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• Spin-glass state in nickelate superconductors
• Hubbard-$U$-corrected electron-phonon interactions in strongly correlated materials via the finite-displacement method
• Effect of doping on the electronic structure, orbital-dependent renormalizations, and magnetic correlations in bilayer La${}_3$Ni${}_2$O${}_7$
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