Electronic Structure and Kohn-Luttinger Superconductivity of Heavily-Doped Single-Layer Graphene
Saul Herrera, Guillermo Parra-Martinez, Philipp Rosenzweig, Bharti Matta, Craig M. Polley, Kathrin Kuster, Ulrich Starke, Francisco Guinea, Jose Angel Silva-Gui… 展开作者
Saul Herrera, Guillermo Parra-Martinez, Philipp Rosenzweig, Bharti Matta, Craig M. Polley, Kathrin Kuster, Ulrich Starke, Francisco Guinea, Jose Angel Silva-Guillen, Gerardo G. Naumis, Pierre A. Pantaleon
The existence of superconductivity (SC) in graphene appears to be established in both twisted and non-twisted multilayers. However, whether their building block, single-layer graphene (SLG), can also host SC remains an open question. Earlier theoretical works predicted that SLG could become a chiral d-wave superconductor driven by electronic interactions when doped to its van Hove singularity, but questions such as whether the d-wave SC survives the strong band renormalizations seen in experiments, its robustness against the source of doping, or if it will occur at any reasonable critical temperature (Tc) have remained difficult to answer, in part due to uncertainties in model parameters. In this study, we adopt a random-phase approximation framework based on a Kohn-Luttinger-like mechanism to investigate SC in heavily-doped SLG. We predict that robust d+id topological SC could arise in SLG doped by Tb, with a Tc up to 600 mK. We also investigate the possibility of realizing d-wave SC by employing other dopants, such as Li or Cs. The structural models have been derived from angle-resolved photoemission spectroscopy measurements on Tb-doped graphene and first-principles calculations for Cs and Li doping. We find that dopants that change the lattice symmetry of SLG are detrimental to the d-wave state. The stability of the d-wave SC predicted here in Tb-doped SLG could provide a valuable insight for guiding future experimental efforts aimed at exploring topological superconductivity in monolayer graphene.
Kohn--Luttinger Superconductivity in Flat Chern Bands
University of Tennessee, Knoxville（田纳西大学诺克斯维尔分校）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；University of Nevada, Reno（内华达大学里诺分校）；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浩高电气与计算机工程系）
Friedel oscillations and chiral superconductivity in monolayer NbSe$_2$
University of Regensburg（雷根斯堡大学）；Donostia International Physics Center（圣塞巴斯蒂安国际物理中心）；University of Silesia in Katowice（卡托维兹西里西亚大学）；Centro de Física de Materiales（材料物理中心）；Ikerbasque, Basque Foundation for Science（伊克拉巴斯科，巴斯克科学基金会）；Wrocław University of Science and Technology（弗罗茨瓦夫科技大学）
Interaction-driven charge textures and unconventional superconductivity in strained monolayer graphene
Posgrado en Ciencias Físicas, Universidad Nacional Autónoma de México (UNAM)（墨西哥国立自治大学物理科学研究生院）；Department of Physics, University of Arkansas（阿肯色大学物理系）；Donostia International Physics Center（圣塞巴斯蒂安国际物理中心）；IMDEA Nanoscience（马德里IMDEA纳米科学研究所）；Center for Theoretical Physics, Hainan University（海南大学理论物理中心）；Department of Physics, Colorado State University（科罗拉多州立大学物理系）；Depto. de Sistemas Complejos, Instituto de Física, Universidad Nacional Autónoma de México (UNAM)（墨西哥国立自治大学物理学院复杂系统系）
Superconductivity Proximate to Non-Abelian Fractional Spin Hall Insulator in Twisted Bilayer MoTe$_2$
Pohang University of Science and Technology（浦项科技大学）；Ulsan National Institute of Science and Technology（蔚山科学技术院）；Daegu Gyeongbuk Institute of Science and Technology (DGIST)（大邱庆北科学技术院）；Korea Advanced Institute of Science and Technology（韩国科学技术院）；Institute for Basic Science（基础科学研究院）
