Stimulated by the recent experiment [F. Ando et al., Nature 584, 373 (2020)], we propose an intrinsic mechanism to cause the superconducting diode effect (SDE). SDE refers to the nonreciprocity of the critical current for the metal-superconductor transition. Among various mechanisms for the critical current, the depairing current is known to be intrinsic to each material and has recently been observed in several superconducting systems. We clarify the temperature scaling of the nonreciprocal depairing current near the critical temperature and point out its significant enhancement at low temperatures. It is also found that the nonreciprocal critical current shows sign reversals upon increasing the magnetic field. These behaviors are understood by the nonreciprocity of the Landau critical momentum and the change in the nature of the helical superconductivity. The intrinsic SDE unveils the rich phase diagram and functionalities of noncentrosymmetric superconductors.
Reversible field-free superconducting diode effect controlled by an antiferromagnet
Institute of Physics, Czech Academy of Sciences（捷克科学院物理研究所）；Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague（布拉格捷克理工大学核科学与物理工程学院）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）；Faculty of Mathematics and Physics, Charles University（查理大学数学与物理学院）
Light induced superconducting diode effect in patterned films
University of Connecticut（康涅狄格大学）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；Nordita, KTH Royal Institute of Technology and Stockholm University（诺尔迪塔，皇家理工学院和斯德哥尔摩大学）
Pseudo-superconducting-diode effect in ferroelectric Josephson junctions
Kavli Institute of Nanoscience, Delft University of Technology（代尔夫特理工大学卡弗里纳米科学研究所）；Department of Quantum Nanoscience, Delft University of Technology（代尔夫特理工大学量子纳米科学系）；Department of Quantum Technology, Netherlands Organisation for Applied Scientific Research (TNO)（荷兰应用科学研究组织（TNO）量子技术部）
Field-free dual superconducting diode via photon-assisted interference
Istituto Nanoscienze-CNR（意大利国家研究委员会纳米科学研究所）；NEST-SNS（新科学技术与纳米中心-比萨高等师范学院）；Instituto de Ciencia de Materiales de Madrid (ICMM)（马德里材料科学研究所）；Consejo Superior de Investigaciones Científicas (CSIC)（西班牙国家科学研究委员会）；Quantum Advanced Research Center (QuARC)（量子先进研究中心）
CIC nanoGUNE-BRTA（巴斯克纳米材料研究中心）；Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU（材料物理中心）；Donostia International Physics Center (DIPC)（圣塞巴斯蒂安国际物理中心）；Ikerbasque, Basque Foundation for Science（伊克拉巴斯克科学基金会）
Altermagnetic superconducting diode effect from non-collinear compensated magnetism in Mn$_3$Pt
Hearne Institute of Theoretical Physics, Department of Physics & Astronomy, Louisiana State University（路易斯安那州立大学）；Department of Physics, Indian Institute of Technology Delhi（印度理工学院德里分校）；Institute for Theoretical Physics III, University of Stuttgart（斯图加特大学）
Geometry controlled superconducting diode and anomalous Josephson effect triggered by the topological phase transition in curved proximitized nanowires
Superconducting diode effect in magnetic superconductors realized by nonreciprocal domain-wall dynamics
Korea Advanced Institute of Science and Technology（韩国科学技术院）；University of Seoul（首尔大学）；Korea Institute for Advanced Study（韩国高等研究院）；University of Illinois at Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校）；Texas A&M University（德克萨斯农工大学）；University of Texas at Austin（德克萨斯大学奥斯汀分校）
Geometric Superconducting Diode Effect in an NbN Nanoring
Nanjing University（南京大学）；Purple Mountain Laboratories（紫金山实验室）；Zhejiang University（浙江大学）；State Key Laboratory of Spintronics Devices and Technologies, Nanjing University（南京大学自旋电子学器件与技术国家重点实验室）；Nanjing University of Science and Technology（南京理工大学）
Prediction of ferroelectric superconductors with reversible superconducting diode effect
非中心对称超导体可以具有超导二极管效应，其中当时间反演对称性也被破坏时，在相反方向上的临界电流是不同的。我们从理论上提出铁电性和超导性共存的铁电超导体可以支持铁电可逆超导二极管效应。通过第一性原理计算，我们预测单层CuNb $_2$ Se $_4$（即，双层NbSe $_2$插入Cu）是这样的铁电超导体，其中铁电性控制层极化以及自旋-轨道耦合引起的自旋分裂的符号。由于临界电流的非互易效应与自旋分裂成正比，因此在铁电性电开关时，超导二极管效应是可逆的。当我们使用CuNb $_2$ Se $_4$作为模型体系时，预测的效应可以出现在一类层间滑动诱导铁电性的二维超导双层膜中。我们的工作为研究二维材料中超导性和铁电性之间的相互作用打开了大门。
Nanoscale electrothermal-switch superconducting diode for electrically programmable superconducting circuits
Nanjing University（南京大学）；Purple Mountain Laboratories（紫金山实验室）；Zhejiang University（浙江大学）；Nanjing University of Science and Technology（南京理工大学）；State Key Laboratory of Spintronics Devices and Technologies, Nanjing University（南京大学自旋电子学器件与技术国家重点实验室）
