Extended superconducting dome revealed by angle-resolved photoemission spectroscopy of electron-doped cuprates prepared by the protect annealing method

The electron-doped cuprates are usually characterized by a more robust antiferromagnetic phase and much narrower superconducting (SC) dome than those of the hole-doped counterparts. Recently, bulk single crystals Pr1.3?xLa0.7CexCuO4?? (PLCCO) prepared protect annealing method have been studied extensively revealed many intriguing properties that were different from obtained samples annealed conventional methods. Here we report on systematic angle-resolved photoemission spectroscopy study PLCCO after annealing. results indicate actual electron concentration (nFS) estimated Fermi-surface area is significantly larger Ce x new nFS-based SC extended towards overdoped side x-based derived for using method.Received 8 June 2020Revised 2 February 2021Accepted 10 2021DOI:https://doi.org/10.1103/PhysRevResearch.3.013180Published American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution to author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasDopantsElectronic structureImpurities in superconductorsSuperconducting transitionPhysical SystemsCupratesHigh-temperature superconductorsTechniquesAngle-resolved spectroscopyCondensed Matter, Materials & Applied Physics