On estimating superconducting shielding volume fraction from susceptibility in pressurized Ruddlesden-Popper nickelates: Response to arXiv:2602.19282
Fudan University（复旦大学）；Center for High Pressure Science and Technology Advanced Research（高压科学实验中心）；Ocean University of China（中国海洋大学）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；ShanghaiTech University（上海科技大学）；Shandong University（山东大学）
In a recent preprint (arXiv:2602.19282) [1], the authors questioned the procedure we used to evaluate the demagnetization-corrected superconducting shielding volume fraction in pressurized Ruddlesden-Popper nickelates [2-5]. They further claimed that this methodology has neither been derived nor used previously, and they proposed an alternative normalization scheme. Here we clarify that our evaluation follows directly from the standard magnetostatic self-consistency relation for finite samples and has been widely adopted in the superconductivity literature for decades. We also demonstrate that the discrepancies claimed in Ref. [1] stem from a fundamental flaw in their approach, namely, the assumption that the measured diamagnetic moment is linearly proportional to the superconducting shielding volume fraction in the presence of a finite demagnetization factor N. This assumption is not valid for strongly demagnetized, thin disk-like specimens, where the internal field and the measured moment are coupled self-consistently through the demagnetizing field.
Shear-stress-constrained superconductivity in Ruddlesden-Popper nickelates
Center for High Pressure Science & Technology Advanced Research（高压科学和技术先进研究中心）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Shanghai Key Laboratory of MFree, Shanghai Advanced Research in Physical Sciences（上海自由磁学重点实验室，上海物理科学先进研究）
Possible high-$T_c$ superconductivity due to incipient narrow bands originating from hidden ladders in Ruddlesden-Popper compounds
我们引入了双层Ruddlesden-Popper型化合物的隐藏梯子的概念：虽然晶体结构是双层的，但过渡金属的相关$t_{2g}$扇区中的$d_{xz}$（$d_{yz}$）轨道沿着$x$（$y$）形成了两条腿的梯子，因为$d_{xz}$（$d_{yz}$）电子主要沿着腿方向$x$（$y$）在横档$z$方向的顶部跳跃。通过第一性原理能带计算，我们预测Sr $_3$ Mo $_2$ O $_7$和Sr $_3$ Cr $_2$ O $_7$是具有合适位置$E_F$的隐梯材料的候选者.基于对这些系统的Eliashberg方程的分析，我们提出了这些材料中高温超导性的可能发生，其起因是阶梯上的宽带和“初始”窄带之间的带间对散射过程。
Preparation and optimization of high-temperature superconducting Ruddlesden-Popper nickelate thin films
Southern University of Science and Technology（南方科技大学）；Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；Tsinghua University（清华大学）
Epitaxial growth of Ruddlesden-Popper neodymium nickelates Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ (${n}$ = 1-5)
采用反应分子束外延技术制备了一系列Ruddlesden-Popper镍酸盐（Nd $_{n+1}$ Ni $_{n}$ O $_{3n+1}$（${n}$ = 1-5））的稳定薄膜。X射线衍射和扫描透射电子显微镜证实了高结晶质量。X射线光电子能谱学表明这些化合物中镍的${n}$依赖价态。金属-绝缘体转变显示出明显的${n}$依赖于中间成员（${n}$ = 3-5），其低温电阻率显示对数依赖性，类似于在超导无限层镍酸盐的母体化合物中观察到的Kondo散射。
Interlayer electronic coherence links magnetism and superconductivity in Ruddlesden-Popper nickelates
State Key Laboratory of Surface Physics and Department of Physics, Fudan University（复旦大学表面物理国家重点实验室和物理系）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）；Institute of Nanoelectronics and Quantum Computing, Fudan University（复旦大学纳米电子与量子计算研究所）
Expanding the trilayer Ruddlesden-Popper nickelate family: Synthesis and characterization of Sm$_4$Ni$_3$O$_{10-δ}$ single crystals
National Laboratory of Solid State Microstructures and Department of Physics, Center for Superconducting Physics and Materials, Collaborative Innovation Center of Advanced Microstructures, Nanjing University（南京大学固体微结构物理国家重点实验室、物理系、超导物理与材料中心、先进微结构协同创新中心）
Comparative Raman study of Ruddlesden-Popper nickelates and the monolayer-trilayer polymorph
Max-Planck-Institute for Solid State Research（马克斯·普朗克固体的研究所）；Hefei National Laboratory（合肥国家实验室）；University of Science and Technology Beijing（北京科技大学）；University of Stuttgart（斯图加特大学）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）
Contrasting Spin Excitations in Octahedral and Square-Planar n=8 Ruddlesden-Popper Nickelates
Yale University（耶鲁大学）；Flatiron Institute（平顿研究所）；Harvard University（哈佛大学）；Donostia International Physics Center (DIPC)（多诺斯蒂亚国际物理中心）；University of California San Diego（加利福尼亚大学圣迭戈分校）；European Synchrotron Radiation Facility（欧洲同步辐射装置）
Itinerant Nature of Spin-Density-Wave Order in Ruddlesden-Popper Nickelates
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）
Three-Dimensional Electronic Structures in Superconducting Ruddlesden-Popper Bilayer Nickelate Films
Southern University of Science and Technology（南方科技大学）；Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；University of Science and Technology of China（中国科学技术大学）；Shanghai Jiao Tong University（上海交通大学）；Tsinghua University（清华大学）
Electronic structures across superconductor-insulator transition in Ruddlesden-Popper bilayer nickelate films
University of Science and Technology of China（中国科学技术大学）；Hefei National Laboratory, University of Science and Technology of China（合肥国家实验室，中国科学技术大学）；Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China（微观尺度物理科学合肥国家研究中心，中国科学技术大学）；Southern University of Science and Technology（南方科技大学）；Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）；Nanjing University（南京大学）；Shanghai Jiao Tong University（上海交通大学）；Tsinghua University（清华大学）
Dissecting superconductivity in the Ruddlesden-Popper nickelates: The role of electron correlation and interlayer magnetic exchange
Diamond Light Source（钻石光源）；National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China（中国科学技术大学核科学与技术学院/国家同步辐射实验室）；Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen University（中山大学物理学院/广东省铁电与磁器件重点实验室）；Department of Physics, University of Oxford（牛津大学物理系）；National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University（南京大学固体微结构物理国家重点实验室/物理学院）；Collaborative Innovation Center of Advanced Microstructures, Nanjing University（南京大学先进微结构协同创新中心）
Thermodynamic phase transition, pairing symmetry and Fermi surface topology in Ruddlesden-Popper nickelate films
University of Science and Technology of China（中国科学技术大学）；Hefei National Laboratory, University of Science and Technology of China（合肥国家实验室，中国科学技术大学）；Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China（中国科学院微观结构国家重点实验室，中国科学技术大学）
General trends of electronic structures, superconducting pairing, and magnetic correlations in the Ruddlesden-Popper nickelate $m$-layered superconductors La$_{m+1}$Ni$_{m}$O$_{3m+1}$
Electronically Inactive Intercalated La$_2$NiO$_4$ Layer in Superconducting La$_5$Ni$_3$O$_{11}$
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（北京凝聚态物理国家实验室和中国科学院物理研究所）；Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences（中国科学院大学卡尔·萨根理论科学研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；New Cornerstone Science Laboratory, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（新基石科学实验室、北京凝聚态物理国家实验室和中国科学院物理研究所）
Electronic Origin of Density Wave Orders in a Trilayer Nickelate
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所凝聚态物理国家实验室）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen University（中山大学物理学院广东省磁电物理与器件重点实验室）；Technical Institute of Physics and Chemistry, Chinese Academy of Sciences（中国科学院化学物理研究所）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）
Theoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La$_4$Ni$_3$O$_{10}$ under pressure and its experimental examination: comparison with La$_3$Ni$_2$O$_7$
Distinguishing Electronic Band Structure of Single-layer and Bilayer Ruddlesden-Popper Nickelates Probed by in-situ High Pressure X-ray Absorption Near-edge Spectroscopy
Electronic structure, magnetic correlations, and superconducting pairing in the reduced Ruddlesden-Popper bilayer La$_3$Ni$_2$O$_6$ under pressure: different role of $d_{3z^2-r^2}$ orbital compared with La$_3$Ni$_2$O$_7$
Spin-density-wave transition in monolayer-trilayer La3Ni2O7 single crystals
ShanghaiTech University（上海科技大学）；Songshan Lake Materials Laboratory（松山湖材料实验室）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Beijing National Laboratory for Condensed Matter Physics（北京凝聚态物理国家研究中心）；University of Chinese Academy of Sciences（中国科学院大学）；Center for High Pressure Science and Technology Advanced Research（高压科学先进研究发展中心）；Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments (MFree)（极端环境材料前沿研究上海市重点实验室）；Institute for Shanghai Advanced Research in Physical Sciences (SHARPS)（上海高等研究院物理科学研究所）；ShanghaiTech Laboratory for Topological Physics（上海科技大学拓扑物理实验室）；Shanghai Key Laboratory of High-resolution Electron Microscopy（高分辨电子显微学上海市重点实验室）；Department of Physics, Clarendon Laboratory, University of Oxford（牛津大学克拉伦登实验室物理系）；School of Physical Sciences, Great Bay University（大湾区大学物理科学学院）
Unveiling pressurized bulk superconductivity in a trilayer nickelate Pr4Ni3O10 single crystal
ShanghaiTech University（上海科技大学）；Songshan Lake Materials Laboratory（松山湖材料实验室）；Center for High Pressure Science and Technology Advanced Research（高压科学前沿研究中心）；Institute for Shanghai Advanced Research in Physical Sciences (SHARPS)（上海物理科学研究院）；Beijing University of Technology（北京工业大学）；Japan Synchrotron Radiation Research Institute（日本同步辐射研究机构）；University of Oxford（牛津大学）；Tsinghua University（清华大学）
Nearly perfect Fermi surface nesting in hole-doped La$_3$Ni$_2$O$_7$ enables bulk superconductivity without pressure or strain
NYU-ECNU Institute of Physics, NYU Shanghai（纽约大学-华东师范大学物理研究所，上海纽约大学）；Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University（华东师范大学极化材料与器件教育部重点实验室）；Department of Physics, Brown University（布朗大学物理系）；Department of Physics, New York University（纽约大学物理系）
Bulk superconductivity up to 96 K in pressurized nickelate single crystals
State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University（山东大学晶体材料研究所）；Center for High Pressure Science and Technology Advanced Research（高压科学和技术先进研究中心）；Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments (MFree), Shanghai Advanced Research in Physical Sciences (SHARPS)（极端环境材料前沿研究上海市重点实验室（MFree），上海物理科学先进研究中心（SHARPS））；Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所，凝聚态物理国家实验室）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology（中国科学院纳米技术标准化与计量重点实验室，国家纳米科学中心）；Key Laboratory of Materials Physics, Ministry of Education, School of Physics, Zhengzhou University（郑州大学物理学院，教育部材料物理重点实验室）；Institute of Quantum Materials and Physics, Henan Academy of Sciences（河南省科学院量子材料与物理研究所）；NSF’s ChemMatCARS, The University of Chicago（芝加哥大学，美国国家科学基金会化学-材料束线组合站（ChemMatCARS））；School of Materials and Energy, University of Electronic Science and Technology of China（电子科技大学材料与能源学院）；Huzhou Key Laboratory of Smart and Clean Energy, Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China（电子科技大学长三角研究院（湖州），湖州市智能清洁能源重点实验室）；Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences（中国科学院上海高等研究院，上海同步辐射光源）；Japan Synchrotron Radiation Research Institute（日本同步辐射研究机构）；NanoTerasu Promotion Division, Japan Synchrotron Radiation Research Institute (JASRI)（日本同步辐射研究机构（JASRI）纳米terasu推进部）
