Materials realization of chiral topological superconductivity is a crucial condition for observing and manipulating Majorana fermions in condensed matter physics. Here we develop a tight-binding description of Pb$_3$Bi/Ge(111), identified recently as an appealing candidate system for realizing chiral $p$-wave topological superconductivity [Nat. Phys. 15, 796 (2019)]. We first show that our phenomenological model can capture the two main features of the electronic band structures obtained from first-principles calculations, namely, the giant Rashba splitting and type-II van Hove singularity. Next, when the $s$-wave superconducting property of the parent Pb system is explicitly considered, we find the alloyed system can be tuned into a chiral topological superconductor with Chern number $\mathcal{C} = -2$, resulting from the synergistic effect of a sufficiently strong Zeeman field and the inherently large Rashba spin-orbit coupling. The nontrivial topology with $\mathcal{C} = -2$ is further shown to be detectable as two chiral Majorana edge modes propagating along the same direction of the system with proper boundaries. We finally discuss the physically realistic conditions to establish the predicted topological superconductivity and observe the corresponding Majorana edge modes, including the influence of the superconducting gap, Landé $g$-factor, and critical magnetic field. The present study provides useful guides in searching for effective $p$-wave superconductivity and Majorana fermions in two-dimensional or related interfacial systems.
Chiral skyrmionic superconductivity from doping a Chern Ferromagnet
Princeton Center for Theoretical Science, Princeton University（普林斯顿大学理论物理中心）；Department of Physics and National High Magnetic Field Laboratory, Florida State University（佛罗里达州立大学物理系及国家高磁场实验室）；Theoretical Division, T-4 and CNLS, Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室理论部T-4和CNLS）；Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室集成纳米技术中心）
Chiral superconductivity from parent Chern band and its non-Abelian generalization
University of Maryland, College Park（马里兰大学帕克分校）；University of California, Berkeley（加州大学伯克利分校）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；Johns Hopkins University（约翰斯·霍普金斯大学）；University of Pittsburgh（匹兹堡大学）
Revealing Superconducting Chiral Edge Modes via Resistance Distributions
Fudan University（复旦大学）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）；Institute for Nanoelectronic Devices and Quantum Computing, Fudan University（复旦大学纳米电子器件与量子计算研究所）；Hefei National Laboratory（合肥国家实验室）
Chiral superconductivity from spin polarized Chern band in twisted MoTe$_2$
University of Tennessee, Knoxville（田纳西大学诺克斯维尔分校）；Tsinghua University（清华大学）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；Shanghai Jiao Tong University（上海交通大学）；Center for Integrated Nanotechnologies (CINT)（综合纳米技术中心）；Min H. Kao Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville（田纳西大学诺克斯维尔分校闵H. Kao电气与计算机工程系）
Signature of chiral superconducting order parameter evidenced in mesoscopic superconductors
Quantum Science Center of Guangdong-HongKong-Macau 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）；The Chinese University of Hong Kong（香港中文大学）
Thermal fluctuations in superconducting phases with chiral $ d + id $ and $ s $ symmetry on a triangular lattice
研究了具有扩展的$ s $和手征$ d + id $对称性的超导序参量的热涨落行为。在准二维单带模型的框架内，在相邻的网站之间的电子之间的吸引力的三角形晶格上进行了研究。本文采用基于泛函积分理论的方法，一致地考虑了耦合电子对的序参量涨落和载流子散射。得到了相位起伏概率随温度和载流子浓度的分布函数。计算了平均超导序参量的振幅随温度的变化。超导态的相图构造的整个范围内的变化的电荷载流子浓度$ 0 <n <2 $。在此范围的边界附近，实现了具有扩展的$ s $对称性的拓扑平凡的超导态，而在它们之间实现了具有拓扑非平凡的手征$ d + id $对称性的超导态。计算出的异常自能与使用机器学习技术获得的实验结果进行了比较。
