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Title: Time-reversal symmetry breaking type-II Weyl state in YbMnBi2
Authors: Borisenko, S.
Evtushinsky, D.
Gibson, Q.
Yaresko, A.
Koepernik, K.
Kim, T.
Ali, M.
van, den, Brink, J.
Hoesch, M.
Fedorov, A.
Haubold, E.
Kushnirenko, Y.
Soldatov, I.
Schäfer, R.
Cava, R. J.
Issue Date: 2019
Publisher: Nature Publishing Group
Citation: Time-reversal symmetry breaking type-II Weyl state in YbMnBi2 / S. Borisenko, D. Evtushinsky, Q. Gibson, A. Yaresko, et al. . — DOI 10.1038/s41467-019-11393-5 // Nature Communications. — 2019. — Vol. 1. — Iss. 10. — 3424.
Abstract: Spectroscopic detection of Dirac and Weyl fermions in real materials is vital for both, promising applications and fundamental bridge between high-energy and condensed-matter physics. While the presence of Dirac and noncentrosymmetric Weyl fermions is well established in many materials, the magnetic Weyl semimetals still escape direct experimental detection. In order to find a time-reversal symmetry breaking Weyl state we design two materials and present here experimental and theoretical evidence of realization of such a state in one of them, YbMnBi2. We model the time-reversal symmetry breaking observed by magnetization and magneto-optical microscopy measurements by canted antiferromagnetism and find a number of Weyl points. Using angle-resolved photoemission, we directly observe two pairs of Weyl points connected by the Fermi arcs. Our results not only provide a fundamental link between the two areas of physics, but also demonstrate the practical way to design novel materials with exotic properties. © 2019, The Author(s).
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85070889439
WOS ID: 000477952600009
PURE ID: 10303535
ISSN: 2041-1723
DOI: 10.1038/s41467-019-11393-5
metadata.dc.description.sponsorship: Deutsche Forschungsgemeinschaft, DFG: BO1912/7-1
Army Research Office, ARO: W911NF-12-0461
We are grateful to Denis Vyalikh, Geunsik Lee, Leonardo Degiorgi, Bernd Büchner, and Peter Armitage for the fruitful discussions, to Vladik Kataev and Stephan Zimmermann for performing ESR measurements, and to Kazuki Sumida, Tomoki Yoshikawa, and Taichi Okuda for performing spin-resolved ARPES measurements. This work was supported by DFG under the grant BO1912/7-1. The research at Princeton was supported by the ARO MURI on topological insulators, grant number W911NF-12-0461. We acknowledge Diamond Light Source for time on I05 under proposal SI11643-1.
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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