The evolution between Fermi liquid and non-Fermi-liquid states in correlated electron systems has been a central subject in condensed matter physics because of the coupled intriguing magnetic and electronic states. An effective pathway to explore the nature of non-Fermi liquid behavior is to approach its phase boundary. Here we report a crossover from non-Fermi liquid to Fermi-liquid state in metallic CaRuO3 through ionic liquid gating induced protonation with electric field. This electronic transition subsequently triggers a reversible magnetic transition with the emergence of an exotic ferromagnetic state from this paramagnetic compound. Our theoretical analysis reveals that hydrogen incorporation plays a critical role in both the electronic and magnetic phase transitions via structural distortion and electron doping. These observations not only help understand the correlated magnetic and electronic transitions in perovskite ruthenate systems, but also provide novel pathways to design electronic phases in correlated materials.
Three-dimensional ferromagnetism and magnetotransport in van der Waals Mn-intercalated tantalum disufide
范德华（vdW）铁磁体是一类重要的自旋电子学材料。最近发现的原子vdW磁体CrI $_3$和Cr $_2$ Ge $_2$ Te $_6$引发了二维（2D）磁性领域的复兴。本文系统地研究了2 H-Mn $_{0.28}$ TaS $_2$单晶，它是一种二维vdW铁磁体，$T_c$ $\sim$为82.3 K，具有较大的面内磁各向异性。测量Mn $K$ -边缘X射线吸收光谱以提供关于其电子状态和局部原子环境的信息。在$T_c$附近测量的详细的磁性等温线表明，2 H-Mn $_{0.28}$ TaS $_2$内的自旋耦合是三维（3D）海森堡型耦合与自旋之间的吸引长程相互作用，衰减为$J(r)\approx r^{-4.85}$。电阻率$ρ(T)$和热电势$S(T)$都在$T_c$附近表现出异常，证实了空穴型输运载流子与局部矩的强烈相互作用。一个不寻常的角度相关的磁阻进一步观察，这表明一个可能的场诱导的新的磁结构。
Emergent 3D Fermiology and Magnetism in an Intercalated Van der Waals System
University of L’Aquila（拉奎拉大学）；CNR-SPIN L’Aquila（意大利国家研究委员会自旋物理研究所拉奎拉分部）；Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes-UMR6226（雷恩大学，法国国家科学研究中心，雷恩化学科学研究所）；Synchrotron SOLEIL（索莱尔同步辐射中心）；CNR-Istituto di Struttura della Materia (CNR-ISM)（意大利国家研究委员会物质结构研究所）；Swiss Light Source, Paul Scherrer Institute（瑞士光源，保罗谢勒研究所）；Deutsches Elektronen-Synchrotron DESY（德国电子同步辐射中心）；MAX IV Laboratory, Lund University（隆德大学马克四实验室）
Charge transfer and competing symmetry breaking drive orbital reconstruction and emergent ferromagnetism in insulating oxide superlattices
Indian Institute of Science（印度科学学院）；Deutsches Elektronen-Synchrotron DESY（德国电子同步加速器中心）；ALBA Synchrotron Light Source（阿尔巴同步辐射光源）；Advanced Photon Source, Argonne National Laboratory（阿贡国家实验室先进光子源）
Observation of correlation-driven topological transport and robust ferromagnetism in 2D CrS$_2$
Institute of Physics（物理研究所）；S. N. Bose National Centre for Basic Sciences（S.N. 玻色基础科学国家中心）；Uppsala University（乌普萨拉大学）；Montanuniversität Leoben（莱奥本矿业大学）；University of Rijeka（里耶卡大学）
Epitaxial growth and antiferromagnetism of Sn-substituted perovskite iridate SrIr$_{0.8}$Sn$_{0.2}$O$_3$
由于其晶格、电荷和自旋自由度之间的强相互作用，5D铱酸盐已经显示出大量的涌现现象，因此薄膜形式在自旋电子学应用中的潜力被高度利用。在这里，我们有外延稳定的钙钛矿型SrIr $_{0.8}$ Sn $_{0.2}$ O $_3$ [001] SrTiO $_3$衬底上通过脉冲激光沉积和系统地表征的结构，电子和磁性。物理性质的测量解开了一个绝缘的基态与弱铁磁性的压缩应变外延膜。通过同步加速器X射线衍射鉴定八面体旋转模式，分辨$a^+b^-c^-$和$a^-b^+c^-$结构域的混合。X射线磁共振散射直接证明了磁序的G型反铁磁结构和弱铁磁性的自旋倾斜性质。
Linear Ensemble-Constrained Quantum Monte Carlo: From Dilute Fermi Gas to Flat-Band Ferromagnetism
Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院人工结构量子控制教育部重点实验室）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；Hefei National Laboratory（合肥国家实验室）
Realizing Quantum Materials with Helium: Helium films at ultralow temperatures, from strongly correlated atomically layered films to topological superfluidity
Emergent magnetism, heavy electrons and pressure-induced reentrant superconductivity in the iron substituted 4d transition-metal sulfides
Zhejiang University of Technology（浙江工业大学）；Fudan University（复旦大学）；Qufu Normal University（曲阜师范大学）；Nanjing University of Posts and Telecommunications（南京邮电大学）；Suzhou University of Technology（苏州科技大学）；Hangzhou Dianzi University（杭州电子科技大学）；National Taiwan Normal University（台湾师范大学）；Academia Sinica（中央研究院）；Zhejiang University（浙江大学）；Ningbo University（宁波大学）；Hangzhou Normal University（杭州师范大学）；Shanghai Jiao Tong University（上海交通大学）
Exchange interactions and finite-temperature magnetism in (111)-oriented (LaMnO$_3$)$_{2n}$|(SrMnO$_3$)$_n$ superlattices
Institute of Physics, Nicolaus Copernicus University（尼古拉·哥白尼大学物理研究所）；School of Physics, Engineering and Technology, University of York（约克大学物理、工程与技术学院）；Department of Physics and Institute of Quantum Convergence and Technology, Kangwon National University（江原国立大学物理系及量子融合技术研究所）；Department of Energy Technology, Korea Institute of Energy Technology (KENTECH)（韩国能源技术研究院能源技术部）；Department of Physics and Astronomy, Uppsala University（乌普萨拉大学物理与天文系）
Insulator-to-Metal Transition via Magnetic Reconstruction at Oxide Interfaces
CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences（中国科学院磁性材料与器件重点实验室，宁波材料技术与工程研究所）；Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences（浙江省磁性材料与应用技术重点实验室，宁波材料技术与工程研究所）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Eastern Institute of Technology（东方理工学院）；International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所磁顶国际研究中心）；CNR-SPIN, UOS Salerno（意大利国家研究委员会自旋中心萨莱诺联合实验室）；Photon Science Division, Paul Scherrer Institut（保罗谢尔研究所光子科学部）；Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences（中国科学院大学材料科学与光电工程技术中心）
Pressure-induced superconductivity beyond magnetic quantum criticality in a Kondo ferromagnet
New Cornerstone Science Laboratory, Center for Correlated Matter and School of Physics, Zhejiang University（浙江大学物理学院关联物质中心新基石科学实验室）；Hubei Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Hubei Normal University（湖北师范大学材料科学与工程学院光电材料与器件湖北省重点实验室）
