Superconductivity in an extreme strange metal

• DOI: 10.1038/s41467-021-24670-z
• Publication Date: 2021-07-21T10:07:53Z
• Authors: D. H. Nguyen; A. Sidorenko; M. Taupin; G. Knebel; G. Lapertot; E. Schuberth; S. Paschen
• Keywords: Cooper pair

Abstract Some of the highest-transition-temperature superconductors across various materials classes exhibit linear-in-temperature ‘strange metal’ or ‘Planckian’ electrical resistivities in their normal state. It is thus believed by many that this behavior holds key to unlock secrets high-temperature superconductivity. However, these typically display complex phase diagrams governed competing energy scales, making an unambiguous identification physics at play difficult. Here we use resistivity measurements into micro-Kelvin regime discover superconductivity condensing out extreme strange metal state—with linear over 3.5 orders magnitude temperature. We propose Cooper pairing mediated modes associated with a recently evidenced dynamical charge localization–delocalization transition, mechanism may well be pertinent also other superconductors.