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Daily Overview: Dear readers, welcome to today’s overview of the latest papers in the field of nickel-based superconductivity. The highlight of today’s work focuses on a deeper understanding of the electronic structure of hybrid Ruddlesden–Popper nickelates. In [1], a theoretical study employing a molecular orbital basis to treat the quarter-filled bilayer system reveals the emergence of Kugel–Khomskii physics and predicts a novel maximal spin-layer entangled phase, providing a specific theoretical framework for understanding composite entanglement in bilayer nickelate superconductors. Additionally, [5] investigates the coexistence of superconductivity and charge density waves (CDW) in correlated systems using the Green’s function method, exploring the impact of next-nearest-neighbor hopping on competition—a topic closely related to the interplay between CDW and superconductivity in nickel-based superconductors, and thus worthy of attention. arXiv submission processing window: 2026-01-09 21:54 to 2026-01-10 17:32 UTC. ...

Daily Overview: Today’s highlights focus on several studies that, while not directly addressing nickelates, investigate physical mechanisms highly relevant to core issues in nickel-based superconductivity. Among them, the research on Jahn-Teller effect-driven lifting of molecular orbital degeneracy and orbital liquid state in NbSeI provides a microscopic picture for understanding the coupling between orbital order and structural distortion in nickelates. The coexistence of Cr-kagome flat bands and Yb-4f correlated flat bands in YbCr₆Ge₆ offers an important analogy for the mechanism of superconductivity driven by hybridization between wide and narrow bands in nickelates. Meanwhile, the symmetry engineering design of perovskite altermagnets provides methodological insights for controlling magnetoelectric coupling in nickel-based heterostructures. Collectively, these works expand the understanding of the origin of unconventional superconductivity in correlated electron systems from the perspectives of electronic correlations, orbital physics, and symmetry control. arXiv submission processing window: 2026-01-08 20:22 to 2026-01-09 19:29 UTC. ...

Daily Overview: Dear readers, welcome to today’s research highlights in the nickel-based superconductivity field. Although none of the papers in today’s list directly focus on nickelate superconductors, several studies are highly relevant to the core issues currently facing nickel-based superconductivity, particularly in terms of electronic structure, superconducting mechanisms, and computational methods. Among them, RIXS studies on the local electronic structure of Ni²⁺ in the pyrochlore antiferromagnet NaCaNi₂F₇ reveal that its octahedral environment is highly robust against A-site disorder, allowing comparisons to the electronic structure stability of the NiO₂ planes in nickel-based superconductors in terms of such local effects. Research on the condensation mechanism of cuprate superconductors reveals bosonic statistical characteristics of strong coupling between pairon excitations and the condensate, and the proposed picture of an energy-dependent gap proportional to the spin-exchange energy may provide insights into understanding similar spin-fluctuation-mediated pairing in nickelates. The discovery of chiral topological order on the surface of the cluster Mott insulator Nb₃Br₈ and its explanation of the zero-field diode effect suggest that surface states in layered correlated systems can give rise to topological superconducting phases under weak correlations, echoing possible interfacial superconducting mechanisms in nickel-based superconductor thin films. Furthermore, the hDMFT method, which achieves full five-orbital DMFT calculations for Ba₂IrO₄ and Ba₂RhO₄, significantly reduces computational costs and provides a feasible pathway for future multi-orbital correlated calculations involving the full d manifold in nickelates. arXiv submission processing window: 2026-01-08 03:40 to 2026-01-08 19:07 UTC. ...

Daily Overview: In today’s paper overview, although no studies directly focusing on nickelates were reported, multiple works are highly relevant to the core issues in nickel-based superconductivity in terms of physical mechanisms and research methods. Among them, [2] demonstrates, through the La₁₋ₓCeₓFeSiH solid solution system, how Kondo entanglement between 3d and 4f correlated electrons finely tunes the competition and coexistence of superconductivity and magnetic order, providing a valuable paradigm for understanding the interaction between nickel 3d and rare-earth 4f electronic states in nickelates. [4] theoretically extends the fluctuation conductivity theory in the ultra-clean limit to multicomponent superconductors, clarifying gauge invariance and critical behavior; its analytical framework for transport signals in multiband systems has direct reference value for nickel-based multiband superconductors. Furthermore, the topological nodal-line superconducting phase realized by coupling in-plane ferromagnetism with conventional s-wave superconductivity in [1], along with the mechanism of band tilting and nodal structure generation, offers new insights for exploring similar topological superconducting states in nickel-based heterostructures. Together, these works enrich the research perspectives on superconducting mechanisms and quantum phase control in correlated electron systems. arXiv submission processing window: 2026-01-07 02:11 to 2026-01-07 19:00 UTC. ...

Daily Overview: Based on the list of papers you provided, today’s daily overview does not include studies directly focused on the field of nickelate superconductors. However, several works discuss physical mechanisms or research methods highly relevant to the core issues currently concerning nickelate superconductivity, making them worthy of attention. The following is the overall introduction prepared for today’s post: — Dear readers, welcome to today’s daily overview of the field of nickelate superconductors. Although the highlighted works today do not directly study nickelates, they focus on key topics such as superconducting pairing mechanisms, electron-phonon coupling modulation, nematic orbital anisotropy, and the competition between charge density waves and superconductivity, providing important references for understanding nickelate superconductivity. For example, [1] proposes interlayer charge-transfer ferroelectric fluctuations as a pairing mechanism for van der Waals superconductors; [2] significantly enhances the superconducting transition temperature of A15-type LaH5.75 via Ba doping; [3] real-space images orbital nematicity in iron-based superconductors using laser PEEM; [5] reveals the competition between CDW and superconductivity in Janus MoXH monolayers; [8] explores electron pairing mechanisms without phonon mediation based on a two-band model. These findings expand the understanding of unconventional superconductivity and complement the current concerns in the nickelate superconductor field regarding electronic structure, pairing mechanisms, and competing orders. arXiv submission processing window: 2026-01-05 21:10 to 2026-01-06 19:28 UTC. ...

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. ...