# Nickelate & Iron-Based Superconductors Domain: Superconductivity & Quantum Materials · 236 papers indexed · newest 2026-10-29 Infinite-layer and Ruddlesden-Popper nickelates (including La3Ni2O7 under pressure and ambient-pressure films) and iron pnictides and chalcogenides. Key concepts: nickelate, La3Ni2O7, infinite-layer, iron-based superconductor, FeSe, pnictide, bilayer nickelate ## Most influential - **[Superconductivity in an infinite-layer nickelate](https://space-kitty.com/papers/doi:10.1038/s41586-019-1496-5)**. Danfeng Li, Kyuho Lee, Bai Yang Wang et al. · 2019 · Nature (doi:10.1038/s41586-019-1496-5 · 1,301 citations). Source: - **[Signatures of superconductivity near 80 K in a nickelate under high pressure](https://space-kitty.com/papers/arxiv:2305.09586)**. Hualei Sun, Mengwu Huo, Xunwu Hu et al. · 2023 · Nature (arXiv:2305.09586 · doi:10.1038/s41586-023-06408-7 · 748 citations). Source: > High-transition-temperature (high-T\_c) superconductivity in cuprates has been discovered for more than three decades, but the underlying mechanism remains a mystery. Cuprates are the only unconventional superconducting family that host bulk superconductivity with T\_cs above the liquid nitrogen boiling temperature at 77 Kelvin. Here we report an observation of superconductivity in single crystals of La3Ni2O7 with a maximum T\_c of 80 Kelvin at pressures between 14.0-43.5 gigapascals using high-pressure resistance and mutual inductive magnetic susceptibility measurements. The superconducting phas… - **[High-temperature superconductivity with zero-resistance and strange metal behavior in La$\_{3}$Ni$\_{2}$O$\_{7-δ}$](https://space-kitty.com/papers/arxiv:2307.14819)**. Yanan Zhang, Dajun Su, Yanen Huang et al. · 2023 · Nature Physics 20, 1269-1273 (2024) (arXiv:2307.14819 · doi:10.1038/s41567-024-02515-y · 309 citations). Source: > Recently signatures of superconductivity were observed close to 80 K in \\LN\\ under pressure. This discovery positions \\LN\\ as the first bulk nickelate with high-temperature superconductivity, but the lack of zero resistance presents a significant drawback for validating the findings. Here we report pressure measurements up to over 30 GPa using a liquid pressure medium and show that single crystals of \\LNO\\ do exhibit zero resistance. We find that \\LNO\\ remains metallic under applied pressures, suggesting the absence of a metal-insulator transition proximate to the superconductivity. Analysis o… - **[Superconductivity in pressurized trilayer La4Ni3O10−δ single crystals](https://space-kitty.com/papers/arxiv:2311.07353)**. Yinghao Zhu, Di Peng, Enkang Zhang et al. · 2024 · Nature (arXiv:2311.07353 · doi:10.1038/s41586-024-07553-3 · 260 citations). Source: > The pursuit of discovering new high-temperature superconductors that diverge from the copper-based paradigm1-3 carries profound implications for elucidating mechanisms behind superconductivity and may also enable new applications4-8. Here, our investigation reveals that application of pressure effectively suppresses the spin and charge order in trilayer nickelate La4Ni3O10-δ single crystals, leading to the emergence of superconductivity with a maximum critical temperature (Tc) of around 30 K at 69.0 GPa. The DC susceptibility measurements confirm a substantial diamagnetic response below Tc, in… - **[Visualization of oxygen vacancies and self-doped ligand holes in La3Ni2O7−δ](https://space-kitty.com/papers/arxiv:2312.15727)**. Zehao Dong, Mengwu Huo, Jie Li et al. · 2024 · Nature (arXiv:2312.15727 · doi:10.1038/s41586-024-07482-1 · 257 citations). Source: > The recent discovery of superconductivity in La3Ni2O7-δ under high pressure with a transition temperature around 80 K has sparked extensive experimental and theoretical efforts. Several key questions regarding the pairing mechanism remain to be answered, such as the most relevant atomic orbitals and the role of atomic deficiencies. Here, we develop a new energy-filtered multislice electron ptychography technique, assisted with electron energy loss spectroscopy, to address these critical issues. Oxygen vacancies are directly visualized and are found to primarily occupy the inner apical sites, w… - **[Electronic structure of the parent compound of superconducting infinite-layer nickelates](https://space-kitty.com/papers/arxiv:1909.02678)**. M. Hepting, D. Li, C. J. Jia et al. · 2019 · Nature Materials 19, 381 (2020) (arXiv:1909.02678 · doi:10.1038/s41563-019-0585-z · 361 citations). Source: > The search for oxide materials with physical properties similar to the cuprate high Tc superconductors, but based on alternative transition metals such as nickel, has grown and evolved over time. The recent discovery of superconductivity in doped infinite-layer nickelates RNiO2 (R = rare-earth element) further strengthens these efforts.With a crystal structure similar to the infinite-layer cuprates - transition metal oxide layers separated by a rare-earth spacer layer - formal valence counting suggests that these materials have monovalent Ni1+ cations with the same 3d electron count as Cu2+ in… - **[Superconductivity in a quintuple-layer square-planar nickelate](https://space-kitty.com/papers/arxiv:2109.09726)**. Grace A. Pan, Dan Ferenc Segedin, Harrison LaBollita et al. · 2021 · Nature Materials (arXiv:2109.09726 · doi:10.1038/s41563-021-01142-9 · 299 citations). Source: > Since the discovery of high-temperature superconductivity in the copper oxide materials, there have been sustained efforts to both understand the origins of this phase and discover new cuprate-like superconducting materials. One prime materials platform has been the rare-earth nickelates and indeed superconductivity was recently discovered in the doped compound Nd$\_{0.8}$Sr$\_{0.2}$NiO$\_2$. Undoped NdNiO$\_2$ belongs to a series of layered square-planar nickelates with chemical formula Nd$\_{n+1}$Ni$\_n$O$\_{2n+2}$ and is known as the 'infinite-layer' ($n = \\infty$) nickelate. Here, we report the s… - **[Nickelate Superconductivity without Rare‐Earth Magnetism: (La,Sr)NiO 2](https://space-kitty.com/papers/arxiv:2105.13494)**. Motoki Osada, Bai Yang Wang, Berit Hansen Goodge et al. · 2021 · Advanced Materials (arXiv:2105.13494 · doi:10.1002/adma.202104083 · 298 citations). Source: > The observation of superconductivity in infinite layer nickelate (Nd,Sr)NiO$\_{2}$ thin films has led to rapid theoretical and experimental investigations of these copper-oxide-analogue systems \[1-15\]. Superconductivity has also been found in (Pr,Sr)NiO$\_{2}$ \[16,17\], but not previously in (La,Sr)NiO$\_{2}$ \[2\], raising a fundamental question whether superconductivity is associated with the presence of rare-earth moments \[18,19\]. Here we show that with significant materials optimization, substantial portions of the La$\_{1-x}$Sr$\_{x}$NiO$\_{2}$ phase diagram can enter the regime of coherent low-te… - **[A superconducting praseodymium nickelate with infinite layer structure](https://space-kitty.com/papers/arxiv:2006.13369)**. Motoki Osada, Bai Yang Wang, Berit H. Goodge et al. · 2020 · Nano Letters (2020) (arXiv:2006.13369 · doi:10.1021/acs.nanolett.0c01392 · 292 citations). Source: > A variety of nickel oxide compounds have long been studied for their manifestation of various correlated electron phenomena. Recently, superconductivity was observed in nanoscale infinite layer nickelate thin films of Nd$\_{0.8}$Sr$\_{0.2}$NiO$\_2$, epitaxially stabilized on SrTiO$\_3$ substrates via topotactic reduction from the perovskite precursor phase. Here we present the synthesis and properties of PrNiO$\_2$ thin films on SrTiO$\_3$. Upon doping in Pr$\_{0.8}$Sr$\_{0.2}$NiO$\_2$, we observe superconductivity with a transition temperature of 7-12 K, and robust critical current density at 2 K of 3… - **[Signatures of ambient pressure superconductivity in thin film La3Ni2O7](https://space-kitty.com/papers/doi:10.1038/s41586-024-08525-3)**. Eun Kyo Ko, Yijun Yu, Yidi Liu et al. · 2024 · Nature (doi:10.1038/s41586-024-08525-3 · 209 citations). Source: - **[s ± -Wave Pairing and the Destructive Role of Apical-Oxygen Deficiencies in La 3 Ni 2 O 7 under Pressure](https://space-kitty.com/papers/arxiv:2307.10144)**. Yubo Liu, Jia‐Wei Mei, Fei Ye et al. · 2023 · Physical Review Letters (arXiv:2307.10144 · doi:10.1103/physrevlett.131.236002 · 218 citations). Source: > Recently, the bilayer perovskite nickelate La$\_3$Ni$\_2$O$\_7$ has been reported to show evidence of high-temperature superconductivity (SC) under a moderate pressure of about 14 GPa. To investigate the superconducting mechanism, pairing symmetry, and the role of apical-oxygen deficiencies in this material, we perform a random-phase-approximation based study on a bilayer model consisting of the $d\_{x^2-y^2}$ and $d\_{3z^2-r^2}$ orbitals of Ni atoms in both the pristine crystal and the crystal with apical-oxygen deficiencies. Our analysis reveals an $s^{\\pm}$-wave pairing symmetry driven by spin f… - **[Ambient-pressure superconductivity onset above 40 K in bilayer nickelate ultrathin films](https://space-kitty.com/papers/arxiv:2412.16622)**. Guangdi Zhou, Wei Lv, Heng Wang et al. · 2024 · Nature 640, 641-646 (2025) (arXiv:2412.16622 · doi:10.1038/s41586-025-08755-z · 186 citations). Source: > The discovery of bilayer nickelate superconductors under high pressure has opened a new chapter in high-transition temperature (high-TC) superconductivity. Here, we report ambient-pressure superconductivity onset above the McMillan limit (40 K) in bilayer nickelate epitaxial ultrathin films. Three-unit-cell (3UC) thick La2.85Pr0.15Ni2O7 single-phase-crystalline films are grown using the gigantic-oxidative atomic-layer-by-layer epitaxy (GOALL-Epitaxy) on SrLaAlO4 substrates. Resistivity measurements and magnetic-field responses indicate onset TC = 45 K. The transition to zero resistance exhibit… - **[Bulk high-temperature superconductivity in pressurized tetragonal La2PrNi2O7](https://space-kitty.com/papers/doi:10.1038/s41586-024-07996-8)**. Ningning Wang, Gang Wang, Xiaoling Shen et al. · 2024 · Nature (doi:10.1038/s41586-024-07996-8 · 207 citations). Source: - **[Superconductivity in infinite-layer nickelate La 1−x Ca x NiO 2 thin films](https://space-kitty.com/papers/arxiv:2105.13492)**. Shengwei Zeng, Changjian Li, Lin Er Chow et al. · 2022 · Science Advances (arXiv:2105.13492 · doi:10.1126/sciadv.abl9927 · 225 citations). Source: > We report the observation of superconductivity in infinite-layer Ca-doped LaNiO$\_2$ (La$\_{1-x}$Ca$\_x$NiO$\_2$) thin films and construct their phase diagram. Unlike the metal-insulator transition in Nd- and Pr-based nickelates, the undoped and underdoped La1-xCaxNiO2 thin films are entirely insulating from 300 K down to 2 K. A superconducting dome is observed at 0.15\ > The latest discovery of high temperature superconductivity near 80K in La3Ni2O7 under high pressure has attracted much attention. Many proposals are put forth to understand the origin of superconductivity.The determination of electronic structures is a prerequisite to establish theories to understand superconductivity in nickelates but is still lacking. Here we report our direct measurement of the electronic structures of La3Ni2O7 by high-resolution angle resolved photoemission spectroscopy. The Fermi surface and band structures of La3Ni2O7 are observed and compared with the band structure cal… ## Newest - **[Majorana Zero Modes in Fractional Vortices](https://space-kitty.com/papers/arxiv:2610.39942)**. Lecheng Fang, Haotian Li, Haijiao Ji et al. · 2026 (arXiv:2610.39942). Source: - **[Direct real-space imaging of sign-reversal superconducting state by scanning Josephson tunneling](https://space-kitty.com/papers/arxiv:2610.38421)**. Tianheng Wei, Yanzhao Liu, Wei Ren et al. · 2026 (arXiv:2610.38421). Source: - **[Separating the Density Wave Phase from Zero-Resistance Superconductivity in La$\_4$Ni$\_3$O$\_{10}$](https://space-kitty.com/papers/arxiv:2610.38959)**. P. Puphal, A. Suthar, B. Wehinger et al. · 2026 (arXiv:2610.38959). Source: - **[Coexistence of superconductivity and magnetic order in BaFe$\_2$S$\_3$: evidence for orbital-selective delocalization](https://space-kitty.com/papers/arxiv:2610.38966)**. Y. Oubaid, N. S. Dhami, P. Fertey et al. · 2026 (arXiv:2610.38966). Source: - **[The fate of $s\_{\\pm}$ superconductivity in the bilayer nickelate La$\_3$Ni$\_2$O$\_7$](https://space-kitty.com/papers/arxiv:2610.35814)**. Kaustubh Roy, Piers Coleman · 2026 (arXiv:2610.35814). Source: - **[Field misalignment effect on the in-plane magnetoresistance in the high-temperature superconductor FeSe/SrTiO3](https://space-kitty.com/papers/arxiv:2610.34168)**. Jie Liu, Zihan Cui, Xiaorong Liu et al. · 2026 · Physical Review B 114, 225413 (2026) (arXiv:2610.34168 · doi:10.1103/cnsg-z5kp). Source: - **[Nodeless d-wave pairing in monolayer FeSe revealed by intra-unit-cell Josephson interferometry](https://space-kitty.com/papers/arxiv:2610.34382)**. Runxin Li, Yuchen Huo, Jiong Mei et al. · 2026 (arXiv:2610.34382). Source: - **[Emergent altermagnetism in (LaVO$\_3$)$\_n$/(LaNiO$\_3$)$\_m$ superlattices from interfacial charge transfer and octahedral tilts](https://space-kitty.com/papers/arxiv:2610.30371)**. Gustavo H. Cassemiro, Walber H. Brito · 2026 (arXiv:2610.30371). Source: - **[Superconducting weak links at substrate steps in bilayer nickelate films](https://space-kitty.com/papers/arxiv:2610.27729)**. Yidi Liu, Yaoju Tarn, Lopa Bhatt et al. · 2026 · Nano Lett. (2026) 26 (37): 12409-12416 (arXiv:2610.27729 · doi:10.1021/acs.nanolett.6c03024). Source: - **[Saturating $T^2$ resistivity in iron-based superconductors](https://space-kitty.com/papers/arxiv:2610.28240)**. M. Lourdes Amigó, Jorge I. Facio · 2026 (arXiv:2610.28240). Source: --- Space Kitty Archive · https://space-kitty.com · API: https://space-kitty.com/api/v1 · MCP: https://space-kitty.com/mcp · Premium: $0.20/request via x402 (Base Sepolia (testnet)). Metadata: arXiv (CC0), OpenAlex (CC0), Europe PMC (CC BY/CC0 works), ClinicalTrials.gov.