Coexistence of Altermagnetic and Compensated Ferrimagnetic Motifs in a Noncollinear Multiferroic

Abstract

Collinear compensated magnets with nonrelativistic spin splitting comprise altermagnets (ALMs), whose rotation- or mirror-related opposite-spin sublattices produce momentum-selective splitting that vanishes at Γ, and compensated ferrimagnets (CFIMs), whose symmetry-inequivalent sublattices allow splitting throughout the Brillouin zone, including at Γ. Here, we show that the coplanar noncollinear magnetic state of multiferroic boracite Ni₃B₇O₁₃Cl hosts both motifs on distinct Ni sublattices in real space. The electronic structure and spin texture exhibit coexisting d-wave-like and s-wave-like spin-polarization components associated with the ALM and CFIM motifs, respectively. Opposite ferroelectric states exhibit reversed band-resolved spin polarizations, indicating magnetoelectric coupling, and sign reversals of linear shift and circular injection currents.

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BibTeX RIS

BibTeX

@misc{chaudhary2026coexistence,
  title = {{Coexistence of Altermagnetic and Compensated Ferrimagnetic Motifs in a Noncollinear Multiferroic}},
  author = {Vikrant Chaudhary and Fu Li and Hui Liu and Mengli Hu and Rajyavardhan Ray and Chen Shen and Jeroen van den Brink and Hongbin Zhang and Harish K. Singh},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.21770},
  eprint = {2610.21770},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.21770},
}

RIS

TY  - UNPB
TI  - Coexistence of Altermagnetic and Compensated Ferrimagnetic Motifs in a Noncollinear Multiferroic
AU  - Vikrant Chaudhary
AU  - Fu Li
AU  - Hui Liu
AU  - Mengli Hu
AU  - Rajyavardhan Ray
AU  - Chen Shen
AU  - Jeroen van den Brink
AU  - Hongbin Zhang
AU  - Harish K. Singh
PY  - 2026
DA  - 2026/10/15
PB  - arXiv
DO  - 10.48550/arxiv.2610.21770
UR  - https://arxiv.org/abs/2610.21770
AB  - Collinear compensated magnets with nonrelativistic spin splitting comprise altermagnets (ALMs), whose rotation- or mirror-related opposite-spin sublattices produce momentum-selective splitting that vanishes at Γ, and compensated ferrimagnets (CFIMs), whose symmetry-inequivalent sublattices allow splitting throughout the Brillouin zone, including at Γ. Here, we show that the coplanar noncollinear magnetic state of multiferroic boracite Ni_3B_7O_13Cl hosts both motifs on distinct Ni sublattices in real space. The electronic structure and spin texture exhibit coexisting d-wave-like and s-wave-like spin-polarization components associated with the ALM and CFIM motifs, respectively. Opposite ferroelectric states exhibit reversed band-resolved spin polarizations, indicating magnetoelectric coupling, and sign reversals of linear shift and circular injection currents.
ER  -

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