TY - JOUR
T1 - Time-reversal symmetry breaking type-II Weyl state in YbMnBi2
AU - Borisenko, Sergey
AU - Evtushinsky, Daniil
AU - Gibson, Quinn
AU - Yaresko, Alexander
AU - Koepernik, Klaus
AU - Kim, Timur
AU - Ali, Mazhar
AU - van den Brink, Jeroen
AU - Hoesch, Moritz
AU - Fedorov, Alexander
AU - Haubold, Erik
AU - Kushnirenko, Yevhen
AU - Soldatov, Ivan
AU - Schäfer, Rudolf
AU - Cava, Robert J.
N1 - Funding Information:
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.
Publisher Copyright:
© 2019, The Author(s).
PY - 2019/12/1
Y1 - 2019/12/1
N2 - 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.
AB - 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.
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U2 - 10.1038/s41467-019-11393-5
DO - 10.1038/s41467-019-11393-5
M3 - Article
C2 - 31366883
AN - SCOPUS:85070889439
SN - 2041-1723
VL - 10
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 3424
ER -