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Time-reversal symmetry breaking type-II Weyl state in YbMnBi2
DOI:
10.1038/s41467-019-11393-5
Authors:
Sergey
Borisenko
(Leibniz IFW Dresden)
,
Daniil
Evtushinsky
(Leibniz IFW Dresden; Ecole Polytechnique Federale Lausanne)
,
Quinn
Gibson
(Princeton University; University of Liverpool)
,
Alexander
Yaresko
(Max-Planck-Institute for Solid State Research)
,
Klaus
Koepernik
(Leibniz IFW Dresden)
,
Timur
Kim
(Diamond Light Source)
,
Mazhar
Ali
(Princeton University)
,
Jeroen
Van Den Brink
(Leibniz IFW Dresden; TU Dresden)
,
Moritz
Hoesch
(Diamond Light Source)
,
Alexander
Fedorov
(IFW Dresden)
,
Erik
Haubold
(Leibniz IFW Dresden)
,
Yevhen
Kushnirenko
(Leibniz IFW Dresden)
,
Ivan
Soldatov
(Leibniz IFW Dresden; Ural Federal University)
,
Rudolf
Schäfer
(Leibniz IFW Dresden)
,
Robert J.
Cava
(Princeton University)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Nature Communications
, VOL 10
State:
Published (Approved)
Published:
July 2019
Diamond Proposal Number(s):
11643

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.
Journal Keywords: Electronic properties and materials; Topological insulators
Subject Areas:
Physics,
Materials
Instruments:
I05-ARPES
Added On:
04/08/2019 19:53
Documents:
s41467-019-11393-5.pdf
Discipline Tags:
Quantum Materials
Hard condensed matter - electronic properties
Physics
Materials Science
Technical Tags:
Spectroscopy
Angle Resolved Photoemission Spectroscopy (ARPES)