Correlated Magnetic Weyl Semimetal State in Strained Pr ₂ Ir ₂ O ₇

Correlated topological phases (CTPs) with interplay between topology and electronic correlations have attracted tremendous interest in condensed matter physics. Therein, correlated Weyl semimetals (WSMs) are rare nature and, thus, so far been less investigated experimentally. In particular, the experimental realization of interacting WSM state logarithmic Fermi velocity renormalization has not achieved yet. Here, evidence a magnetic strained pyrochlore iridate Pr2Ir2O7 (PIO) which is paramagnetic Luttinger semimetal bulk, reported. Benefitting from epitaxial strain, “bulk-absent” all-in–all-out antiferromagnetic ordering can be stabilized PIO film, breaks time-reversal symmetry leads to state. With further analysis data group calculations, an liquid logarithmically renormalized velocity, similar that graphene, found, dressed by long-range Coulomb interactions. This work highlights magnetism, correlations, paves way for strain-engineering CTPs iridates.