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MnNBr Monolayer: A High‐Temperature Ferromagnetic Half‐Metal with Type‐II Weyl Fermions
Author(s) -
Shi Yongting,
Li Lingjun,
Cui Xin,
Song Tielei,
Liu Zhifeng
Publication year - 2021
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202170027
Subject(s) - condensed matter physics , ferromagnetism , curie temperature , fermion , spintronics , massless particle , dirac fermion , physics , monolayer , helicity , materials science , quantum mechanics , nanotechnology
2D ferromagnetic materials with full spin polarization, high Curie temperature, and novel massless fermions are highly desirable for spintronics applications. In article number 2100115 , Zhifeng Liu and co‐workers demonstrate that the orthorhombic MnNBr monolayer is a needed ferromagnetic half‐metal, which not only has a high Curie temperature (910 K), but also holds a type‐II Weyl state with Lorentz symmetry broken. Remarkably, near the type‐II Weyl point, there is direction‐dependent band dispersion: the largest fermion velocities up to 6.86 × 10 5 m s −1 and quasi‐flat bands with negligible band dispersion can be found in different k directions.