Fermi surface and pseudogap in highly doped Sr₂IrO₄.

ABSTRACT: The fate of the Fermi surface in bulk electron-doped Sr₂IrO₄ remains elusive, as does the origin and extension of its pseudogap phase. Here, we use high-resolution angle-resolved photoelectron spectroscopy (ARPES) to investigate the electronic structure of Sr_2-x La _x IrO₄ up to x = 0.2, a factor of two higher than in previous work. We find that the antinodal pseudogap persists up to the highest doping level, and thus beyond the sharp increase in Hall carrier density to ≃ 1 + x recently observed above x* ≃ 0.16¹. This suggests that doped iridates host a unique phase of matter in which a large Hall density coexists with an anisotropic pseudogap, breaking up the Fermi surface into disconnected

SUBMITTER: Alexanian Y 

PROVIDER: S-EPMC12494496 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature