Phonon-mediated unconventional superconductivity in rhombohedral stacked multilayer graphene  

作　　者：Emil Viñas Boström Ammon Fischer Jonas B.Profe Jin Zhang Dante M.Kennes Angel Rubio 

机构地区：[1]Max Planck Institute for the Structure and Dynamics of Matter,Luruper Chaussee 149,22761 Hamburg,Germany [2]Nano-Bio Spectroscopy Group,Departamento de Física de Materiales,Universidad del País Vasco,20018 San Sebastian,Spain [3]Institute for Theory of Statistical Physics,RWTH Aachen University,and JARA Fundamentals of Future Information Technology,52062 Aachen,Germany [4]Center for Computational Quantum Physics,Flatiron Institute,Simons Foundation,New York City,NY,10010,USA

出　　处：《npj Computational Materials》2024年第1期1558-1565,共8页计算材料学(英文)

基　　金：We acknowledge support from the Cluster of Excellence“CUI:Advanced Imaging of Matter”-EXC 2056-project ID 390715994 and SFB-925“Lightinduced dynamics and control of correlated quantum systems”-project 170620586 of the Deutsche Forschungsgemeinschaft(DFG),and Grupos Consolidados(IT1453-22);EVB acknowledges funding from the European Union’s Horizon Europe research and innovation program under the Marie Skłodowska-Curie grant agreement No 101106809.

摘　　要：Understanding the origin of superconductivity in correlated two-dimensional materials is a key step in leveraging material engineering techniques for next-generation nanoscale devices.While it is widely accepted that phonons fluctuations only mediate conventional(s-wave)superconductivity,the common phenomenology of superconductivity in Bernal bilayer and rhombohedral trilayer graphene,as well as in a large family of graphene-based moirésystems,suggests a common superconducting mechanism across these platforms.In particular,in all these platforms some superconducting regions violate the Pauli limit,indicating unconventional superconductivity,naively ruling out conventional phonon-mediated pairing as the underlying mechanism.Here we combine first principles simulations with effective low-energy theories to investigate the superconducting mechanism and pairing symmetry in rhombohedral stacked graphene multilayers.

关 键 词：mechanism SUPERCONDUCTIVITY CONVENTIONAL 

分 类 号：O61[理学—无机化学]