By using a molecular beam epitaxy technique, we fabricate a new type of superconducting superlattices with controlled atomic layer thicknesses of alternating blocks between heavy fermion superconductor CeCoIn_5, which exhibits a strong Pauli pair-breaking effect, and nonmagnetic metal YbCoIn_5. The introduction of the thickness modulation of YbCoIn_5 block layers breaks the inversion symmetry centered at the superconducting block of CeCoIn_5. This configuration leads to dramatic changes in the temperature and angular dependence of the upper critical field, which can be understood by considering the effect of the Rashba spin-orbit interaction arising from the inversion symmetry breaking and the associated weakening of the Pauli pair-breaking effect. Since the degree of thickness modulation is a design feature of this type of superlattices, the Rashba interaction and the nature of pair-breaking are largely tunable in these modulated superlattices with strong spin-orbit coupling.
Spin-orbit coupling controlling the superconducting dome of artificial superlattices of quantum wells
虽然已知可以通过使用Fano-费什巴赫共振调谐Lifshitz跃迁附近的化学势来驱动双能隙超导体中的Tc的共振放大，但是对于通过Rashba自旋轨道耦合（RSOC）接头与选定k空间点处的声子介导（e-ph）配对的协同相互作用来调谐Tc共振知之甚少。在这里，我们提出了第一性原理量子计算的超导电性的人工异质结构的金属量子阱与3 nm的周期，量子尺寸效应给出了两个间隙的超导电性与RSOC控制的内部电场之间的界面处的纳米级金属层插入绝缘间隔层。这项工作的关键结果表明，包括RSCO在内的纳米级基本量子力学效应（Mazziotti et al Phys. Rev. B，103，024523，2021）为环境压力下非常规高温超导体的定量材料设计提供了应用物理学中的关键工具。我们讨论了超导圆顶，其中Tc是Lifshitz参数（？）测量由于量子尺寸效应而出现的新的小费米面与拓扑Lifshitz跃迁的距离，所述量子尺寸效应具有有限的自旋-轨道耦合和与声子能量截止的软化相关联的出现的第二费米面中的可变e-ph耦合g。
Superconducting dome due to the Fano-Feshbach shape resonance in artificial high-Tc superlattices
Institute of Crystallography, National Research Council, CNR（意大利国家研究委员会晶体学研究所）；Rome International Center for Materials Science Superstripes RICMASS（罗马国际材料科学超条纹研究中心 RICMASS）；Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University（罗马第三大学工业、电子和机械工程系）；Istituto Nazionale di Fisica Nucleare INFN, Sezione Roma Tre（意大利国家核物理研究所罗马三分部）；National High Magnetic Field Laboratory (NHMFL), Los Alamos National Laboratory (LANL)（洛斯阿拉莫斯国家实验室国家高磁场实验室）；Laboratoire National des Champs Magnétiques Intenses（强磁场国家实验室）；Department of Physics and Astronomy, Baylor University（贝勒大学物理与天文系）；CQM group, School of Pharmacy, Physics Unit, University of Camerino（卡梅里诺大学药学院物理学单元量子物质小组）；Department of Physics, Sapienza University（罗马第一大学物理系）；Max Planck Institute for Solid State Research（马克斯·普朗克固体研究所）
Misfit layer superconductors, tuneable bulk heterostructures with strong 2D effects
P.J. Šafárik University（P.J. 萨法里克大学）；Institute of Experimental Physics, Slovak Academy of Sciences（斯洛伐克科学院实验物理研究所）；University of Trento（特伦托大学）；Sorbonne Université, CNRS, Institute des Nanoscience de Paris（索邦大学，法国国家科学研究中心，巴黎纳米科学研究所）
