Correlation induced electron-hole asymmetry in quasi- two-dimensional iridates.

ABSTRACT: The resemblance of crystallographic and magnetic structures of the quasi-two-dimensional iridates Ba₂IrO₄ and Sr₂IrO₄ to La₂CuO₄ points at an analogy to cuprate high-Tc superconductors, even if spin-orbit coupling is very strong in iridates. Here we examine this analogy for the motion of a charge (hole or electron) added to the antiferromagnetic ground state. We show that correlation effects render the hole and electron case in iridates very different. An added electron forms a spin polaron, similar to the cuprates, but the situation of a removed electron is far more complex. Many-body 5d ⁴ configurations form which can be singlet and triplet states of total angular momentum that strongly affect the hole motion. T

SUBMITTER: Parschke EM 

PROVIDER: S-EPMC5612937 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature