2020/12/31 by T. Valla, Petar Pervan, P. Pervan +7
Materials Science · Physics and Astronomy · #Condensed matter physics #Cuprate #Doping #Electron #Fermi level #Fermi surface #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic properties of thin films #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1209/0295-5075/134/17002
published as EPL 134 17002 (2021) · 6 pages, 3 Figures, 1 Table
openalex created_date 2021/01/05 · openalex publication_date 2021/04/01 · arxiv created 2021/06/16 · arxiv updated 2021/06/17 · openalex updated_date 2026/08/05
Abstract In high-temperature cuprate superconductors, the anti-ferromagnetic spin fluctuations are thought to have a very important role in naturally producing an attractive interaction between the electrons in the d -wave channel. The connection between superconductivity and spin fluctuations is expected to be especially consequential at the overdoped end point of the superconducting dome. In some materials, that point seems to coincide with a Lifshitz transition, where the Fermi surface changes from the hole-like centered at to the electron-like, centered at the Γ point causing a loss of large momentum anti-ferromagnetic fluctuations. Here, we study the doping dependence of the electronic structure of Bi 1.8 Pb 0.4 Sr 2 CuO in angle-resolved photoemission and find that the superconductivity vanishes at lower doping than that at which the Lifshitz transition occurs. This requires a more detailed re-examination of a spin fluctuation scenario.