Closing in on possible scenarios for infinite-layer nickelates: comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy
Liang Si, Eric Jacob, Wenfeng Wu, Andreas Hausoel, Juraj Krsnik, Paul Worm, Simone Di Cataldo, Oleg Janson, Karsten Held
Conflicting theoretical scenarios for infinite-layer nickelate superconductors have been hotly debated, particularly regarding whether {only} a single Ni-3$d_{x^2-y^2}$ band is relevant at low energies besides electron pockets or whether multi-orbital physics including Ni-3$d_{z^2}$ is instead essential. The first scenario has emerged from density-functional theory plus dynamical mean-field theory (DFT+DMFT) calculations. Comparing the previous DFT+DMFT spectra to recent angular-resolved photoemission spectroscopy (ARPES) experiments, we find excellent agreement for both the Fermi surface and the strongly renormalized quasi-particle bands, supporting the first scenario. Our key findings further suggest that the "waterfalls" observed in ARPES might emerge from the quasi-particle--to--Hubbard-band crossover, and that additional spectral weight close to the $A$-pocket {likely} originates from the Ni-3$d_{xy}$ orbital.
Squeezing dynamical singlets in bilayer nickelates
Center for Computational Quantum Physics, Flatiron Institute（Flatiron研究所计算量子物理中心）；Department of Physics, Columbia University（哥伦比亚大学物理系）；Université Paris-Saclay, CNRS, CEA, Institut de physique théorique（巴黎萨克雷大学、法国国家科学研究中心、法国原子能和替代能源委员会、理论物理研究所）
Luttinger Liquid Behavior in a Single-Layer Nickelate La1.4Sr0.6NiO4
Tsinghua University（清华大学）；Yale University（耶鲁大学）；University of Oxford（牛津大学）；Diamond Light Source（钻石光源）；SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Shanghai Advanced Research Institute, Chinese Academy of Sciences（中国科学院上海高等研究院）；University of Science and Technology of China（中国科学技术大学）；ShanghaiTech University（上海科技大学）
Direct Observation of Unidirectional Density Wave and Band splitting in a Single-Domain Trilayer Nickelate Pr$_4$Ni$_3$O$_{10}$
University of Science and Technology of China（中国科学技术大学）；Fudan University（复旦大学）；Shanghai Research Center for Quantum Sciences（上海量子科学研究与交流中心）；University of Chinese Academy of Sciences（中国科学院大学）；Shanghai Advanced Research Institute, Chinese Academy of Sciences（中国科学院上海高等研究院）；Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences（中国科学院上海微系统与信息技术研究所）
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）
Superconductivity and Electronic Structures of Nickelate Thin Film Superstructures
Southern University of Science and Technology（南方科技大学）；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）
Correlation-Driven Orbital-Selective Fermiology and Superconductivity in the Bilayer Nickelate La$_3$Ni$_2$O$_7$
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和物理学院）；Collaborative Innovation Center of Advanced Microstructures, Nanjing University（南京大学先进微结构协同创新中心）；Jiangsu Key Laboratory of Quantum Information Science and Technology, Nanjing University（南京大学江苏省量子信息科学与技术重点实验室）
Orbital-selective Mottness Driven by Geometric Frustration of Interorbital Hybridization in Pr4Ni3O10
Tsinghua University（清华大学）；ShanghaiTech University（上海科技大学）；Songshan Lake Materials Laboratory（松山湖材料实验室）；Yale University（耶鲁大学）；Diamond Light Source（钻石光源）；University of Oxford（牛津大学）；Lanzhou University（兰州大学）；Shanghai Advanced Research Institute, Chinese Academy of Sciences（中国科学院上海高等研究院）；University of Science and Technology of China（中国科学技术大学）；SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Hefei National Laboratory（合肥国家实验室）
Orbital-Selective Diagonal-Gap Test of Pairing in La$_3$Ni$_2$O$_7$
Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；School of Physics, Beijing Institute of Technology（北京理工大学物理学院）；Department of Physics, Xiamen University（厦门大学物理系）；School of Physics, Hangzhou Normal University（杭州师范大学物理学院）
