Unconventional superconductivity without doping: infinite-layer nickelates under pressure DOI Creative Commons
Simone Di Cataldo, Paul Worm, Jan M. Tomczak

et al.

arXiv (Cornell University), Journal Year: 2023, Volume and Issue: unknown

Published: Jan. 1, 2023

High-temperature unconventional superconductivity quite generically emerges from doping a strongly correlated parent compound, often (close to) an antiferromagnetic insulator. The recently developed dynamical vertex approximation is state-of-the-art technique that has quantitatively predicted the superconducting dome of nickelates. Here, we apply it to study effect pressure in infinite-layer nickelate Sr$_x$Pr$_ {1-x}$NiO$_2$. We reproduce increase critical temperature ($T_c$) under found experiment up 12 GPa. According our results, $T_c$ can be further increased with higher pressures. Even without Sr-doping PrNiO$_2$, will become high-temperature superconductor thanks enhanced self-doping \nidxsqysq{} orbital pressure. With maximal \Tc{} 100\,K around 100\,GPa, superconductors reach best cuprates.

Language: Английский

Unconventional superconductivity without doping in infinite-layer nickelates under pressure DOI Creative Commons
Simone Di Cataldo, Paul Worm, Jan M. Tomczak

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: May 10, 2024

Abstract High-temperature unconventional superconductivity quite generically emerges from doping a strongly correlated parent compound, often (close to) an antiferromagnetic insulator. The recently developed dynamical vertex approximation is state-of-the-art technique that has quantitatively predicted the superconducting dome of nickelates. Here, we apply it to study effect pressure in infinite-layer nickelate Sr x Pr 1− NiO 2 . We reproduce increase critical temperature ( T c ) under found experiment up 12 GPa. According our results, can be further increased with higher pressures. Even without Sr-doping PrNiO , will become high-temperature superconductor thanks enhanced self-doping Ni $${d}_{{x}^{2}-{y}^{2}}$$ d x 2 − y orbital pressure. With maximal 100 K around GPa, superconductors reach best cuprates.

Language: Английский

Citations

12
Origin of a Topotactic Reduction Effect for Superconductivity in Infinite-Layer Nickelates DOI
Shengwei Zeng, Chi Sin Tang,

Zhaoyang Luo

et al.

Physical Review Letters, Journal Year: 2024, Volume and Issue: 133(6)

Published: Aug. 8, 2024

Topotactic reduction utilizing metal hydrides as reagents has emerged an effective approach to achieve exceptionally low oxidization states of ions and unconventional coordination networks. This method opens avenues the development entirely new functional materials, with one notable example being infinite-layer nickelate superconductors. However, effect on atomic reconstruction electronic structures-crucial for superconductivity-remains largely unresolved. We designed two sets control Nd_{0.8}Sr_{0.2}NiO_{2} thin films used secondary ion mass spectroscopy highlight absence reduction-induced hydrogen intercalation. X-ray absorption revealed a significant linear dichroism dominant Ni 3d_{x2-y2} orbitals superconducting samples, indicating single-band nature nickelates. Consistent T_{c}, 3d asymmetry manifests domelike dependence duration. Our results unveil critical role in modulating Ni-3d orbital polarization its impact properties.

Language: Английский

Citations

9
Extensive hydrogen incorporation is not necessary for superconductivity in topotactically reduced nickelates DOI Creative Commons
Purnima P. Balakrishnan, Dan Ferenc Segedin, L. E. Chow

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 27, 2024

Abstract A key open question in the study of layered superconducting nickelate films is role that hydrogen incorporation into lattice plays appearance state. Due to challenges stabilizing highly crystalline square planar films, are prepared by deposition a more stable parent compound which then transformed target phase via topotactic reaction with strongly reducing agent such as CaH 2 . Recent studies, both experimental and theoretical, have introduced possibility from may be critical for superconductivity. In this work, we use secondary ion mass spectrometry examine La 1− x X NiO / SrTiO 3 ( = Ca Sr) Nd 6 Ni 5 O 12 NdGaO along non-superconducting NdNiO (Nd,Sr)NiO We find no evidence extensive across broad range samples, including films. Theoretical calculations indicate broadly energetically unfavorable these systems, supporting our conclusion not generally required achieve state square-planar nickelates.

Language: Английский

Citations

4
Hardening of Ni-O bond-stretching phonons in LaNiO2 DOI
Yilin Wang

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(8)

Published: Feb. 6, 2025

Citations

0
Multiorbital Cu impurity embedded in an anisotropic square lattice of oxygen atoms DOI
Yan Peng, Mi Jiang

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(8)

Published: Feb. 12, 2025

Language: Английский

Citations

0
Understanding the Role of Hydrogen and Oxygen in Electronic Phase Changes of Nickelates DOI Creative Commons
Laura Guasco, Rebecca Pons, David Cortie

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

Abstract Many electronic and electrochemical devices rely on the exchange of light elements such as hydrogen oxygen with environment. Understanding tailoring device functionality requires accurate information about concentration chemical bonding species inside a solid, which is particularly difficult if several are exchanged. In LaNiO 3 thin films in situ transport experiments reveal re‐entrant metal–insulator transition upon exposure. The origin this unusual behavior can be understood by combining stoichiometry determined neutron reflectometry x‐ray absorption spectroscopy, respectively. addition to metallic parent phase, an insulating phase composition 2.65 2.15 (OH) 0.5 identified. They inter‐converted redox reactions different external environments. methodology employed offers new insights into mechanisms underlying influence functional devices.

Language: Английский

Citations

0
Unconventional superconductivity without doping: infinite-layer nickelates under pressure DOI Creative Commons
Simone Di Cataldo, Paul Worm, Jan M. Tomczak

et al.

arXiv (Cornell University), Journal Year: 2023, Volume and Issue: unknown

Published: Jan. 1, 2023

High-temperature unconventional superconductivity quite generically emerges from doping a strongly correlated parent compound, often (close to) an antiferromagnetic insulator. The recently developed dynamical vertex approximation is state-of-the-art technique that has quantitatively predicted the superconducting dome of nickelates. Here, we apply it to study effect pressure in infinite-layer nickelate Sr$_x$Pr$_ {1-x}$NiO$_2$. We reproduce increase critical temperature ($T_c$) under found experiment up 12 GPa. According our results, $T_c$ can be further increased with higher pressures. Even without Sr-doping PrNiO$_2$, will become high-temperature superconductor thanks enhanced self-doping \nidxsqysq{} orbital pressure. With maximal \Tc{} 100\,K around 100\,GPa, superconductors reach best cuprates.

Language: Английский

Citations

0