Nickelate & Iron-Based Superconductors
Infinite-layer and Ruddlesden-Popper nickelates (including La3Ni2O7 under pressure and ambient-pressure films) and iron pnictides and chalcogenides.
Most influential
- Superconductivity in an infinite-layer nickelateArticle1,301 citationsdoi:10.1038/s41586-019-1496-5
- Signatures of superconductivity near 80 K in a nickelate under high pressure
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 o…
Article748 citationsarXiv:2305.09586doi:10.1038/s41586-023-06408-7 - High-temperature superconductivity with zero-resistance and strange metal behavior in La$_{3}$Ni$_{2}$O$_{7-δ}$
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 press…
Article309 citationsarXiv:2307.14819doi:10.1038/s41567-024-02515-y - Superconductivity in pressurized trilayer La4Ni3O10−δ single crystals
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 nick…
Article260 citationsarXiv:2311.07353doi:10.1038/s41586-024-07553-3 - Visualization of oxygen vacancies and self-doped ligand holes in La3Ni2O7−δ
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 ene…
Article257 citationsarXiv:2312.15727doi:10.1038/s41586-024-07482-1 - Electronic structure of the parent compound of superconducting infinite-layer nickelates
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 structu…
Article361 citationsarXiv:1909.02678doi:10.1038/s41563-019-0585-z - Superconductivity in a quintuple-layer square-planar nickelate
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 compo…
Article299 citationsarXiv:2109.09726doi:10.1038/s41563-021-01142-9 - Nickelate Superconductivity without Rare‐Earth Magnetism: (La,Sr)NiO 2
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 supercond…
Article298 citationsarXiv:2105.13494doi:10.1002/adma.202104083 - A superconducting praseodymium nickelate with infinite layer structure
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…
Article292 citationsarXiv:2006.13369doi:10.1021/acs.nanolett.0c01392 - Signatures of ambient pressure superconductivity in thin film La3Ni2O7Article209 citationsdoi:10.1038/s41586-024-08525-3
- s ± -Wave Pairing and the Destructive Role of Apical-Oxygen Deficiencies in La 3 Ni 2 O 7 under Pressure
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 o…
Article218 citationsarXiv:2307.10144doi:10.1103/physrevlett.131.236002 - Ambient-pressure superconductivity onset above 40 K in bilayer nickelate ultrathin films
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-crystall…
Article186 citationsarXiv:2412.16622doi:10.1038/s41586-025-08755-z - Bulk high-temperature superconductivity in pressurized tetragonal La2PrNi2O7Article207 citationsdoi:10.1038/s41586-024-07996-8
- Superconductivity in infinite-layer nickelate La 1−x Ca x NiO 2 thin films
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 …
Article225 citationsarXiv:2105.13492doi:10.1126/sciadv.abl9927 - Orbital-Dependent Electron Correlation in Double-Layer Nickelate La3Ni2O7
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…
Article210 citationsarXiv:2309.01148doi:10.1038/s41467-024-48701-7
Newest work
- Majorana Zero Modes in Fractional VorticesPreprintarXiv:2610.39942
- Direct real-space imaging of sign-reversal superconducting state by scanning Josephson tunnelingPreprintarXiv:2610.38421
- Separating the Density Wave Phase from Zero-Resistance Superconductivity in La$_4$Ni$_3$O$_{10}$PreprintarXiv:2610.38959
- Coexistence of superconductivity and magnetic order in BaFe$_2$S$_3$: evidence for orbital-selective delocalizationPreprintarXiv:2610.38966
- The fate of $s_{\pm}$ superconductivity in the bilayer nickelate La$_3$Ni$_2$O$_7$PreprintarXiv:2610.35814
- Field misalignment effect on the in-plane magnetoresistance in the high-temperature superconductor FeSe/SrTiO3ArticlearXiv:2610.34168doi:10.1103/cnsg-z5kp
- Nodeless d-wave pairing in monolayer FeSe revealed by intra-unit-cell Josephson interferometryPreprintarXiv:2610.34382
- Emergent altermagnetism in (LaVO$_3$)$_n$/(LaNiO$_3$)$_m$ superlattices from interfacial charge transfer and octahedral tiltsPreprintarXiv:2610.30371
- Superconducting weak links at substrate steps in bilayer nickelate filmsArticlearXiv:2610.27729doi:10.1021/acs.nanolett.6c03024
- Saturating $T^2$ resistivity in iron-based superconductorsPreprintarXiv:2610.28240