TY  - JOUR
AU  - Sato, Manabu
AU  - Bouaziz, Juba
AU  - Sumita, Shuntaro
AU  - Kobayashi, Shingo
AU  - Tateishi, Ikuma
AU  - Blügel, Stefan
AU  - Furusaki, Akira
AU  - Hirayama, Motoaki
TI  - Ideal spin-orbit-free Dirac semimetal and diverse topological transitions in Y8CoIn3 family
JO  - Communications materials
VL  - 5
IS  - 1
SN  - 2662-4443
CY  - London
PB  - Springer Nature
M1  - FZJ-2024-06277
SP  - 253
PY  - 2024
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001355396900001
DO  - DOI:10.1038/s43246-024-00635-9
UR  - https://juser.fz-juelich.de/record/1032484
ER  -