Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
By S. Hayami, Y. Yanagi, H. Kusunose. Journal of the Physical Society of Japan, 2019
469 citations recorded by the source corpus.
We clarify the macroscopic symmetry and microscopic model-parameter conditions for emergence of spin-split electronic band structure in collinear antiferromagnets without atomic spin-orbit coupling. By using the microscopic multipole descriptions, we elucidate the fundamental degree of freedom in a cluster unit of an antiferromagnet giving rise to an effective spin-orbit interaction through the anisotropic kinetic motions of electrons. We show a correspondence of the ordering patterns and resultant momentum-dependent spin splitting for 32 crystallographic point groups after demonstrating two intuitive examples of four-sublattice pyrochlore and tetragonal systems. Our study unveils potential features of collinear antiferromagnets with considerably weak spin-orbit coupling in light-element materials and 3$d$ transition metal oxides, which can be utilized for a spin-current generation by electric (thermal) current and a magneto-striction effect.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/3f3007f86b867ef46c877878d5943d7c10ad4359
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Citations in the corpus
- Topological transition from nodal to nodeless Zeeman splitting in altermagnets (2023, background): “In agreement with previous works [3, 15, 17, 19, 24], we find a momentum-dependent Zeeman splitting of the bands, ∆E (k) ≡ E+ (k) − E− (k), which in our case is given by ∆E (k) ∝ |d (k)|.”