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Emergent altermagnetism in (LaVO3)n/(LaNiO3)m superlattices from interfacial charge transfer and octahedral tilts

  • Gustavo H. Cassemiro
  • Walber H. Brito
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Abstract

Using first-principles calculations, we show that altermagnetism emerges in (LaVO3)n/(LaNiO3)m superlattices, with (n,m) = (1,1), (2,2) and (2,4), from the interplay of interfacial charge transfer and octahedral tilts. Charge transfer drives the system towards the V4+ and Ni2+ configuration, turning the otherwise paramagnetic nickelate layers into a magnetically active sublattice. The resulting C-type antiferromagnetic order, combined with a-b+c- or a-b-c- octahedral tilts, links opposite-spin sublattices only through nonsymmorphic operations, yielding a d-wave spin splitting without spin-orbit coupling. Within DFT+U, the splitting reaches 118 meV in the insulating (LVO)1/(LNO)1 superlattice, about twice that calculated for bulk LaVO3, and decreases as the nickelate layers become thicker. Our findings indicate that this splitting is hosted by both the V and Ni sublattices, with nearly half of its weight on oxygen 2p states through p-d covalency. Interfacial charge transfer thus emerges as a \textit{design} principle for engineering altermagnetism in oxide heterostructures.

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Cite

BibTeXRIS
BibTeX
@misc{cassemiro2026emergent,
  title = {{Emergent altermagnetism in (LaVO$_3$)$_n$/(LaNiO$_3$)$_m$ superlattices from interfacial charge transfer and octahedral tilts}},
  author = {Gustavo H. Cassemiro and Walber H. Brito},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.30371},
  eprint = {2610.30371},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.30371},
}
RIS
TY  - UNPB
TI  - Emergent altermagnetism in (LaVO_3)_n/(LaNiO_3)_m superlattices from interfacial charge transfer and octahedral tilts
AU  - Gustavo H. Cassemiro
AU  - Walber H. Brito
PY  - 2026
DA  - 2026/10/21
PB  - arXiv
DO  - 10.48550/arxiv.2610.30371
UR  - https://arxiv.org/abs/2610.30371
AB  - Using first-principles calculations, we show that altermagnetism emerges in (LaVO_3)_n/(LaNiO_3)_m superlattices, with (n,m) = (1,1), (2,2) and (2,4), from the interplay of interfacial charge transfer and octahedral tilts. Charge transfer drives the system towards the V^4+ and Ni^2+ configuration, turning the otherwise paramagnetic nickelate layers into a magnetically active sublattice. The resulting C-type antiferromagnetic order, combined with a^-b^+c^- or a^-b^-c^- octahedral tilts, links opposite-spin sublattices only through nonsymmorphic operations, yielding a d-wave spin splitting without spin-orbit coupling. Within DFT+U, the splitting reaches 118 meV in the insulating (LVO)_1/(LNO)_1 superlattice, about twice that calculated for bulk LaVO_3, and decreases as the nickelate layers become thicker. Our findings indicate that this splitting is hosted by both the V and Ni sublattices, with nearly half of its weight on oxygen 2p states through p-d covalency. Interfacial charge transfer thus emerges as a \textit{design} principle for engineering altermagnetism in oxide heterostructures.
ER  -