Through either elements intercalation or application of pressure, transition metal dichalcogenide 1T-TiSe2 exhibits superconductivity in proximity to a charge density wave (CDW) quantum critical point (QCP), thus providing an ideal avenue to study the correlation between the two symmetry-breaking exotic quantum electronic states. We report herein that, in addition to the well-known superconducting dome that emerges within the low pressure range of 2 - 4 GPa and peaks with the maximal Tc of about 1.8 K, the pressure induces another separate superconducting transition starting around 15 GPa with a substantially higher Tc that reaches 5.6 K at about 21.5 GPa. The high-pressure X-ray diffraction and Raman spectroscopy measurements unveil that the superconductivity reentrant is caused by a first-order structural phase transition (from P-3m1 space group to Pnma space group), which is also supported by the density functional theory calculation. A comparative theoretical calculation also reveals that the conventional phonon-mediated mechanism can account for the superconductivity of 1T-TiSe2 under low pressure, while the electron-phonon coupling of 4O-TiSe2 under high pressure is too weak to induce the superconductivity with a Tc as high as 5.6 K. This implies that the emergent superconductivity in the 4O-TiSe2 may have an unconventional origin. Our finding would open a new window toward the discovery of more exotic quantum states in transition metal dichalcogenides via high pressure.
Critical Temperature Oscillations and Reentrant Superconductivity due to the FFLO like State in F/S/F Trilayers
铁磁体/超导体/铁磁体（F/S/F）三层结构构成了超导自旋阀的核心，其中类Fulde-Ferrell Larkin-Ovchinnikov（FFLO）态的建立导致了超导对波函数的干涉效应。在这样的三层中实现强临界温度振荡，作为铁磁层厚度的函数，或者甚至更有效地，重入超导性，是获得大自旋阀效应的关键条件，即临界温度的大偏移。这两种现象已实现实验中的Cu 41 Ni 59/Nb/Cu 41 Ni 59三层在本工作中研究。
本文用电输运和磁测量方法研究了Eu（Fe $_{1-x}$ Ir $_{x}$）$_{2}$ As $_{2}$的超导电性与Eu $^{2+}$磁有序的相互作用。对于临界掺杂的样品Eu（Fe $_{0.86}$ Ir $_{0.14}$）$_{2}$作为$_{2}$，我们目睹了两个不同的转变：低于22.6 K的超导转变，其次是由Eu $^{2+}$矩的有序化引起的电阻率再入。此外，低场磁化强度测量显示出由于超导性而引起的突出的抗磁信号，这在大磁矩磁有序系统的存在下是显著的。与母体化合物EuFe $_{2}$ As $_{2}$一起研究了12.5% Ir掺杂EuFe $_{1.75}$ Ir $_{0.25}$ As $_{2}$的电子结构。与EuFe $_{2}$ As $_{2}$相比，掺杂的化合物在整个能量标度上具有更低的态密度值，具有更宽的带宽和涉及Ir的更强的杂化。相对于纯化合物，EuFe $_{1.75}$ Ir $_{0.25}$ As $_{2}$中费米能的移动和带填充的变化指示系统中的电子掺杂。
Pressure-induced reentrant superconductivity in a misfit layered compound $\mathrm{(SnS)_{1.15}(TaS_2)}$
Qufu Normal University（曲阜师范大学）；Center for High Pressure Science and Technology Advanced Research（高压科学和技术先进研究中心）；Xinyang Normal University（信阳师范大学）；Jining University（济宁学院）；Indian Institute of Technology Roorkee（印度理工学院鲁尔基分校）；Academia Sinica（中央研究院）；Zhejiang University of Technology（浙江工业大学）
Signatures of unconventional superconductivity near reentrant and fractional quantum anomalous Hall insulators
Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交大李政道研究所）；School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院）；Hong Kong University of Science and Technology（香港科技大学）；University of Tennessee（田纳西大学）；Fudan University（复旦大学）；Southern University of Science and Technology (SUSTech)（南方科技大学）；National Institute for Materials Science（国立材料研究所）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Hefei National Laboratory（合肥国家实验室）；Min H. Kao Department of Electrical Engineering and Computer Science, University of Tennessee（田纳西大学明H. Kao电气与计算机工程系）
Possible restoration of superconductivity in the quasi-one-dimensional conductor Li$_{0.9}$Mo$_6$O$_{17}$ in feasibly high pulsed magnetic fields, $H \simeq 100 \ T$
本文从理论上研究了准一维（Q1D）导体中三重态重入超导相的超导恢复。将已知的Q1D超导体Li $_{0.9}$ Mo $_6$ O $_{17}$的能带和超导参数代入我们的理论方程，表明这种恢复在$H \simeq 100 \ T$量级的高强度非破坏性脉冲磁场中是可行的.我们详细研究了磁场方向与其最佳实验几何形状的微小倾斜如何降低再入相的超导转变温度，这对于其可能的实验发现是重要的。
Theory of reentrant superconductivity in Corbino Josephson junctions
Cornell University（康奈尔大学）；Weizmann Institute of Science（魏茨曼科学研究所）；Harvard University（哈佛大学）；Sungkyunkwan University (SKKU)（成均馆大学）；Institute for Basic Science (IBS)（基础科学研究院）；John A. Paulson School of Engineering and Applied Sciences, Harvard University（哈佛大学约翰·A·保尔森工程与应用科学学院）；Columbia University（哥伦比亚大学）
Pressure-induced Structural Phase Transition, Metallization, and Superconductivity in layered metalloid dichalcogenide 1T-SiTe$_2$
National Laboratory of Solid State Microstructures and Department of Physics, 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和物理学院，先进微结构协同创新中心）
High-field-stabilized reentrant superconductivity in infinite-layer nickelate thin films
National High Magnetic Field Laboratory, Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室高磁场实验室）；Department of Physics, Faculty of Science, National University of Singapore（新加坡国立大学理学院物理系）；Center for Integrated Nanotechnologies, Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室集成纳米技术中心）；Department of Physics, Faculty of Science and Technology, Universitas Airlangga（艾尔朗加大学理学院物理系）；Singapore Synchrotron Light Source (SSLS), National University of Singapore（新加坡国立大学新加坡同步辐射光源）；Department of Physics, The Chinese University of Hong Kong（香港中文大学物理系）
A chemical avenue to manipulate field-reentrant superconducting rivalries in infinite layer nickelates
University of Science and Technology Beijing（北京科技大学）；Beijing Normal University（北京师范大学）；Anhui University（安徽大学）；Center for High Pressure Science and Technology Advanced Research（高压科学与技术先进研究中心）；Institute for Shanghai Advanced Research in Physical Sciences (SHARPS)（上海物理科学前沿研究院）；Chinese Academy of Sciences（中国科学院）；North China Electric Power University（华北电力大学）；East China Normal University（华东师范大学）；PSI Center for Neutron and Muon Sciences（瑞士保罗谢勒研究所中子与缪子科学中心）
Multiple odd-parity superconducting phases in bilayer transition metal dichalcogenides
研究了二维局部非中心对称三角晶格中的非常规超导性。例如，该模型与具有2 H $_b$堆叠结构的双层过渡金属二硫属化物相关。在无规相位近似下，通过求解线性化的Eliashberg方程分析了超导不稳定性.我们发现，铁磁涨落是占主导地位的，由于存在断开费米口袋附近的范霍夫奇点，因此奇宇称自旋三重态超导性是有利的。在没有自旋轨道耦合的情况下，我们发现奇宇称$f$波超导态在很宽的载流子密度和层间耦合范围内是稳定的。此外，我们还研究了层相关的交错Rashba和Zeeman自旋轨道耦合对超导电性的影响。得到了自旋-轨道耦合和库仑相互作用对多重奇宇称超导相图的影响。特别是，拓扑手性$p$波配对状态是稳定的存在下，一个温和的塞曼自旋轨道耦合。我们的结果揭示了奇宇称超导在各种铁磁范德华材料的可能性。
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）
