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@ARTICLE{Sato:1032484,
author = {Sato, Manabu and Bouaziz, Juba and Sumita, Shuntaro and
Kobayashi, Shingo and Tateishi, Ikuma and Blügel, Stefan
and Furusaki, Akira and Hirayama, Motoaki},
title = {{I}deal spin-orbit-free {D}irac semimetal and diverse
topological transitions in {Y}8{C}o{I}n3 family},
journal = {Communications materials},
volume = {5},
number = {1},
issn = {2662-4443},
address = {London},
publisher = {Springer Nature},
reportid = {FZJ-2024-06277},
pages = {253},
year = {2024},
abstract = {Topological semimetals, known for their intriguing
properties arising from band degeneracies, have garnered
significant attention. However, the discovery of a material
realization and the detailed characterization of spinless
Dirac semimetals have not yet been accomplished. Here, we
propose from first-principles calculations that the RE8CoX3
group (RE = rare earth elements, X = Al, Ga, or In)
contains ideal spinless Dirac semimetals whose Fermi
surfaces are fourfold degenerate band-crossing points
(without including spin degeneracy). Despite the lack of
space inversion symmetry in these materials, Dirac points
are formed on the rotation-symmetry axis due to accidental
degeneracies of two bands corresponding to different
2-dimensional irreducible representations of the C6v group.
We also investigate, through first-principles calculations
and effective model analysis, various phase transitions
caused by lattice distortion or elemental substitutions from
the Dirac semimetal phase to distinct topological
semimetallic phases such as nonmagnetic linked-nodal-line
and Weyl semimetals (characterized by the second
Stiefel–Whitney class) and ferromagnetic Weyl semimetals.},
cin = {PGI-1},
ddc = {600},
cid = {I:(DE-Juel1)PGI-1-20110106},
pnm = {5211 - Topological Matter (POF4-521)},
pid = {G:(DE-HGF)POF4-5211},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001355396900001},
doi = {10.1038/s43246-024-00635-9},
url = {https://juser.fz-juelich.de/record/1032484},
}