Daily Overview: This post sorts papers by relevance to nickelate superconductors. Summaries are AI-generated and may contain errors. arXiv submission processing window: times are unavailable (UTC).

1. Spin-density-wave transition in monolayer-trilayer La3Ni2O7 single crystals

  • Relevance Score: 6.1872
  • Authors: Mingxin Zhang, Jie Dou, Di Peng, Cuiying Pei, Qi Wang, Yi Zhao, Chao Xiong, Shuo Li, Jun Luo, Juefei Wu, Lingxiao Zhao, Qing Zhang, Jie Yang, Yulin Chen, Jinkui Zhao, Wenge Yang, Hanjie Guo, Qiaoshi Zeng, Rui Zhou, Yanpeng Qi
  • Affiliations: ShanghaiTech University, Center for High Pressure Science and Technology Advanced Research, Great Bay University, Chinese Academy of Sciences, Songshan Lake Materials Laboratory
  • Link: http://arxiv.org/abs/2601.13090v1
  • Paper page: Spin-density-wave transition in monolayer-trilayer La₃Ni₂O₇ single crystals

Summary: This study successfully synthesized high-quality, long-range ordered hybrid 1313-type La₃Ni₂O₇ single crystals (with an alternating monolayer-trilayer structure) and systematically characterized their physical properties. At ambient pressure, the material exhibits typical semiconducting behavior and displays distinct anomalies in resistivity, magnetic susceptibility, and specific heat at 170 K. ¹³⁹La nuclear magnetic resonance spectroscopy unambiguously confirms that these anomalies originate from a spin-density wave (SDW) transition. High-pressure electrical transport measurements indicate that the application of pressure can induce metallization; however, no superconductivity is observed up to 65 GPa. These findings establish hybrid 1313-type La₃Ni₂O₇ as a new member of the Ruddlesden-Popper nickelate family featuring a unique SDW transition, offering a platform for investigating the interplay among crystal structure, electronic order, and superconductivity in hybrid nickelates.

2. Weakly anisotropic superconductivity of Pr4Ni3O10 single crystals

  • Relevance Score: 5.3479
  • Authors: Cuiying Pei, Yang Shen, Di Peng, Mingxin Zhang, Yi Zhao, Xiangzhuo Xing, Qi Wang, Juefei Wu, Junjie Wang, Lingxiao Zhao, Zhenfang Xing, Yulin Chen, Jinkui Zhao, Wenge Yang, Xiaobing Liu, Zhixiang Shi, Hanjie Guo, Qiaoshi Zeng, Guang-Ming Zhang, Yanpeng Qi
  • Affiliations: Tsinghua University, ShanghaiTech University, Center for High Pressure Science and Technology Advanced Research, Institute for Shanghai Advanced Research in Physical Sciences (SHARPS), Southeast University, Songshan Lake Materials Laboratory, University of Oxford, Qufu Normal University
  • Link: http://arxiv.org/abs/2601.13084v1
  • Paper page: Weakly anisotropic superconductivity of Pr₄Ni₃O₁₀ single crystals

Summary: This study performed in situ high-pressure angle-dependent electrical transport measurements on Pr₄Ni₃O₁₀ single crystals using a custom diamond anvil cell rotator, confirming their superconducting anisotropy. Under a pressure of 50.2 GPa, the sample underwent a superconducting transition with a critical temperature of approximately 31 K. By measuring the upper critical fields perpendicular and parallel to the ab-plane, an anisotropy parameter γ of about 1.6 was obtained, which decreased with increasing temperature and approached 1 near the superconducting critical temperature. Fitting with the Ginzburg-Landau model yielded zero-temperature upper critical fields parallel and perpendicular to the ab-plane of 89.9 T and 57.3 T, respectively, and coherence lengths along the ab-plane and c-axis of 2.4 nm and 1.5 nm, respectively. Comparison with cuprate and iron-based superconductors revealed that the anisotropic behavior of Pr₄Ni₃O₁₀ conforms to a two-band model, where in-plane quantum confinement induces interlayer coherence, resulting in three-dimensional superconducting characteristics. This study not only confirms the existence of anisotropic superconductivity in bulk Ruddlesden-Popper nickelates but also provides critical insights into the role of dimensionality in the mechanism of high-temperature superconductivity.

3. Correlation between superfluid density and transition temperature in infinite-layer nickelate superconductor $Nd_{1-x}Sr_xNiO_2$

Summary: This study employed scanning superconducting quantum interference microscopy to perform local magnetic susceptibility and magnetic flux imaging on infinite-layer nickelate superconductor Nd₀.₈Sr₀.₂NiO₂ thin films, aiming to elucidate the correlation between the zero-temperature superfluid density and the superconducting transition temperature. Owing to micron-scale inhomogeneities in the samples, spatial statistical analysis revealed that when the local (T_c) exceeds 8 K, (T_c) exhibits a linear relationship with (\rho_{s0}); conversely, when (T_c) is below 8 K, the dependence becomes sublinear (approximately (T_c \propto \rho_{s0}^{1/2})). This overall behavior closely resembles observations in overdoped cuprate superconductors, suggesting a potentially intimate intrinsic connection between the superconducting mechanisms of infinite-layer nickelate and cuprate superconductors.

4. Superconductivity in doped symmetric mass generation insulator: a quantum Monte-Carlo study

Summary: This study employs sign-problem-free quantum Monte Carlo simulations to systematically investigate a bilayer fermionic model with strong interlayer antiferromagnetic exchange coupling and local Hubbard repulsion, which serves as a prototype for realizing the symmetric mass generation (SMG) insulator. The numerically exact results unambiguously demonstrate that robust superconducting pairing emerges upon doping the SMG insulator phase, and the Hubbard repulsion significantly enhances the superconducting order parameter. Given that this model may capture key features of the high-temperature superconductor La₃Ni₂O₇ under high pressure, this work establishes a new paradigm for achieving superconductivity starting from a doped SMG parent state, providing important theoretical guidance for future experimental exploration.