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Correlated Magnetic Weyl Semimetal State in Strained Pr2Ir2O7

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Title
Correlated Magnetic Weyl Semimetal State in Strained Pr2Ir2O7
Author(s)
Yangyang Li; Taekoo Oh; Jaeseok Son; Jeongkeun Song; Mi Kyung Kim; Dongjun Song; Sukhyun Kim; Seo Hyoung Chang; Changyoung Kim; Bohm-Jung Yang; Noh, Tae Won
Publication Date
2021-06
Journal
Advanced Materials, v.33, no.25
Publisher
John Wiley and Sons Inc
Abstract
© 2021 The Authors. Advanced Materials published by Wiley-VCH GmbHCorrelated 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.
URI
https://pr.ibs.re.kr/handle/8788114/9815
DOI
10.1002/adma.202008528
ISSN
0935-9648
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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