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Daily Overview: Today’s highlight focuses on a deeper understanding of the electronic structure of mixed Ruddlesden–Popper nickelates. In [1], a study using polarization-resolved ultrafast spectroscopy reveals electronic nematicity with broken twofold rotational symmetry at low temperatures in bilayer La₃Ni₂O₇, while the trilayer La₄Ni₃O₁₀ remains isotropic. This finding suggests a potential link between nematic fluctuations and high-pressure superconducting pairing. Additionally, the study of the Ruddlesden–Popper double perovskite oxide Sr₃Co₂O₇ in [5] proposes a mechanism for charge-disproportionation-driven polar antiferromagnetic metal, a model that may provide insights into the synergy between layered structure and electronic correlations in nickelates. arXiv submission processing window: 2026-01-05 00:23 to 2026-01-05 19:00 UTC. ...

Daily Overview: Dear readers, welcome to today’s rapid overview of papers in the nickel-based superconductivity field. Although no studies directly targeting nickelates are included today, the work in [1] on the orbital separation between charge order and superconductivity in the cuprate La₂₋ₓSrₓCuO₄ is highly relevant to ongoing discussions in the nickel-based superconductivity field regarding multi-band electronic structure competition. That study, employing X-ray spectroscopy and c-axis uniaxial pressure, found that compressional strain drives an orbital separation between superconductivity (originating from the d_{x²-y²} state) and charge order (gradually shifting to the d_{z²} channel), suggesting that similar multi-order coexistence in nickel oxide superconductors also requires descriptions beyond a single-band model. arXiv submission processing window: 2026-01-03 23:26 to 2026-01-04 19:16 UTC. ...

Daily Overview: Today’s highlights focus on multi-angle advances in superconductivity mechanisms, orbitronics, and exciton physics. Although these studies are not directly targeting nickelate superconductors, the enhanced electron-phonon coupling, orbital Hall effect in light 3d metals, and spectroscopic signatures of local exciton pair breaking involved are closely related to the pairing mechanisms, orbital manipulation, and quantum critical behavior currently of interest in nickel-based superconductivity. [1] First-principles calculations reveal that applying 12% biaxial tensile strain to the two-dimensional carbon allotrope THO-graphene can achieve a superconducting transition temperature of 45 K, providing an example of strain-tuned electron-phonon coupling. [2] The demonstration of vertical magnetization switching driven by the orbital Hall effect in the light 3d transition metal nitride VN, with an orbital torque efficiency up to -0.41, offers new insights for designing orbitronic devices. [3] Using scanning tunneling spectroscopy, subgap states induced by a single Te vacancy impurity that break exciton pairs are observed in the excitonic insulator Ta₂Pd₃Te₅, revealing atomic-scale fingerprints of local de-pairing effects. arXiv submission processing window: 2026-01-03 07:22 to 2026-01-03 08:30 UTC. ...

Daily Overview: Dear readers, welcome to today’s quick overview of papers in the field of nickel-based superconductivity. Although no new papers directly studying nickelates were published today, several works explore physical mechanisms highly relevant to the current core issues in nickel-based superconductivity. Among them, [1] reveals the promotion of superconducting transition temperature by nematic fluctuations in CuxTiSe₂ through elastoresistance measurements, providing a material platform for the nematic fluctuation-mediated superconducting mechanism—nematic order and its fluctuations being one of the electronic states of great interest in the nickel-based superconductivity field. Meanwhile, [4] theoretically investigates the robustness of flat-band superconductivity in kagome lattices under disorder, finding that preserving flat-band degeneracy effectively resists disorder-induced degradation. This conclusion offers insights into understanding the possible flat-band electronic structures in nickelates and their superconductivity-enhancing effects. These works enrich the physical picture closely related to nickel-based superconductivity from different perspectives. arXiv submission processing window: 2026-01-02 02:52 to 2026-01-02 17:11 UTC. ...

Daily Overview: In today’s paper overview, although there is no direct study on nickelate superconductors, several works explore physical mechanisms closely related to the core issues of nickel-based superconductivity. [1] analyzes the masking of the ferromagnetic quantum critical point by spin density waves in NbFe₂, providing a new experimental paradigm for understanding possible quantum critical behavior in infinite-layer nickelates. [4] constructs a unified topological phase diagram of the quantum Hall and superconducting vortex lattice states, revealing the mechanism by which Landau level mixing induces topological superconductivity in the weak-pairing limit, offering insights for designing topological phases in nickel-based superconductors. Additionally, [5] investigates the effect of electron-hole asymmetry on Δ_T noise in superconducting quantum point contacts, providing a theoretical framework for studying non-equilibrium transport at nickel-based superconducting interfaces. These works enrich the understanding of related physical phenomena from different perspectives. arXiv submission processing window: 2025-12-31 20:20 to 2026-01-01 17:44 UTC. ...