Spin-Density-Driven Hybrid Spin Splitting in Collinear Compensated Magnets
Abstract
Nonrelativistic spin splitting in collinear compensated magnets is constrained by spin-group symmetry, with distinct alternating and Zeeman-type splitting typically associated with altermagnets and fully compensated ferrimagnets, respectively. From a spin-density perspective, we propose a class of hybrid compensated magnets in which alternating-like and Zeeman-type spin splitting coexist within a single collinear compensated state. Using a minimal two-sector model, we demonstrate that this coexistence arises from competition between directional sublattice dispersion and the sector-dependent energy biases arising from the same structural inequivalence. First-principles calculations provide a proof of concept in a crossed bilayer of unequal-width Janus graphene nanoribbons, where the structurally inequivalent ribbons retain approximately symmetry-related spin-density distributions. The valence and conduction sectors support direction-selective spin transport and energy-selective spin-polarized states, respectively. These results connect the spatial organization of spin density with the electronic response to structural inequivalence, providing a design principle for hybrid spin splitting in compensated magnets.
Related
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BibTeX
@misc{xu2026spindensitydriven,
title = {{Spin-Density-Driven Hybrid Spin Splitting in Collinear Compensated Magnets}},
author = {Peibo Xu and Yixuan Che and Yuxuan Li and Haifeng Lv and Xiaojun Wu and Jinlong Yang},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.04617},
eprint = {2611.04617},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.04617},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Spin-Density-Driven Hybrid Spin Splitting in Collinear Compensated Magnets
AU - Peibo Xu
AU - Yixuan Che
AU - Yuxuan Li
AU - Haifeng Lv
AU - Xiaojun Wu
AU - Jinlong Yang
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.04617
UR - https://arxiv.org/abs/2611.04617
AB - Nonrelativistic spin splitting in collinear compensated magnets is constrained by spin-group symmetry, with distinct alternating and Zeeman-type splitting typically associated with altermagnets and fully compensated ferrimagnets, respectively. From a spin-density perspective, we propose a class of hybrid compensated magnets in which alternating-like and Zeeman-type spin splitting coexist within a single collinear compensated state. Using a minimal two-sector model, we demonstrate that this coexistence arises from competition between directional sublattice dispersion and the sector-dependent energy biases arising from the same structural inequivalence. First-principles calculations provide a proof of concept in a crossed bilayer of unequal-width Janus graphene nanoribbons, where the structurally inequivalent ribbons retain approximately symmetry-related spin-density distributions. The valence and conduction sectors support direction-selective spin transport and energy-selective spin-polarized states, respectively. These results connect the spatial organization of spin density with the electronic response to structural inequivalence, providing a design principle for hybrid spin splitting in compensated magnets.
ER -