Correlated Magnetic Weyl Semimetal State in Strained Pr2Ir2O7
Abstract
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 in nature and, thus, have so far been less investigated experimentally. In particular, the experimental realization of the interacting WSM state with logarithmic Fermi velocity renormalization has not been achieved yet. Here, experimental evidence of a correlated magnetic WSM state with logarithmic renormalization in strained pyrochlore iridate Pr2Ir2O7 (PIO) which is a paramagnetic Luttinger semimetal in bulk, is reported. Benefitting from epitaxial strain, “bulk‐absent” all‐in–all‐out antiferromagnetic ordering can be stabilized in PIO film, which breaks time‐reversal symmetry and leads to a magnetic WSM state. With further analysis of the experimental data and renormalization group calculations, an interacting Weyl liquid state with logarithmically renormalized Fermi velocity, similar to that in graphene, is found, dressed by long‐range Coulomb interactions. This work highlights the interplay of strain, magnetism, and topology with electronic correlations, and paves the way for strain‐engineering of CTPs in pyrochlore iridates.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 14, 2021
- Source ID
- 10.1002/adma.202008528
Entities
People
- Bohm‐jung Yang
- Changyoung Kim
- Dongjun Song
- Jaeseok Son
- Jeongkeun Song
- Mi Kyung Kim
- Noh Tae-won
- Seo Hyoung Chang
- Sukhyun Kim
- Taekoo Oh
- Yangyang Li
Organizations
- Army Research Office
- Chung-Ang University
- Institute for Basic Science
- National Research Foundation of Korea
- Seoul National University