The non-relativistic spin-momentum locking in altermagnets gives rise to a time-reversal-odd spin Hall effect, known as the altermagnetic spin-splitting effect (ASSE). Although ASSE was first reported in RuO2, subsequent experiments have yielded inconsistent results, leaving its spin transport mechanism unclear. Here, we systematically investigate how strain, crystal orientation, and the Hubbard U parameter influence the magnetic ground state and spin Hall response of RuO2. Guided by recent experimental observations, we find that U is likely smaller than the value required to induce intrinsic magnetism, suggesting that bulk RuO2 and (001)/(101) RuO2 thin films grown on TiO2 are non-magnetic in the absence of extrinsic effects. In contrast, (100) and (110) films exhibit strain-induced altermagnetic spin splitting, leading to a strong ASSE even without Hubbard U corrections. These results reconcile previous experimental discrepancies and provide design guidelines for RuO2-based spintronic devices.
Abstract
Journal Article
eng
42312477
Lee, Seungjun, et al. "Strain-Driven Altermagnetic Spin-Splitting Effect in RuO2." Nano Letters, 2026.
Lee S, Jeong SG, Wang JP, et al. Strain-Driven Altermagnetic Spin-Splitting Effect in RuO2. Nano Lett. 2026.
Lee, S., Jeong, S. G., Wang, J. P., Jalan, B., & Low, T. (2026). Strain-Driven Altermagnetic Spin-Splitting Effect in RuO2. Nano Letters. https://doi.org/10.1021/acs.nanolett.6c00768
Lee S, et al. Strain-Driven Altermagnetic Spin-Splitting Effect in RuO2. Nano Lett. 2026 Jun 18; PubMed PMID: 42312477.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR
T1 - Strain-Driven Altermagnetic Spin-Splitting Effect in RuO2.
AU - Lee,Seungjun,
AU - Jeong,Seung Gyo,
AU - Wang,Jian-Ping,
AU - Jalan,Bharat,
AU - Low,Tony,
Y1 - 2026/06/18/
PY - 2026/6/18/pubmed
PY - 2026/6/18/medline
PY - 2026/6/18/entrez
KW - Hubbard U correction
KW - RuO2
KW - altermagnetism
KW - density functional theory
KW - spin Hall effect
KW - strain
JF - Nano letters
JO - Nano Lett
N2 - The non-relativistic spin-momentum locking in altermagnets gives rise to a time-reversal-odd spin Hall effect, known as the altermagnetic spin-splitting effect (ASSE). Although ASSE was first reported in RuO2, subsequent experiments have yielded inconsistent results, leaving its spin transport mechanism unclear. Here, we systematically investigate how strain, crystal orientation, and the Hubbard U parameter influence the magnetic ground state and spin Hall response of RuO2. Guided by recent experimental observations, we find that U is likely smaller than the value required to induce intrinsic magnetism, suggesting that bulk RuO2 and (001)/(101) RuO2 thin films grown on TiO2 are non-magnetic in the absence of extrinsic effects. In contrast, (100) and (110) films exhibit strain-induced altermagnetic spin splitting, leading to a strong ASSE even without Hubbard U corrections. These results reconcile previous experimental discrepancies and provide design guidelines for RuO2-based spintronic devices.
SN - 1530-6992
UR - https://www.unboundmedicine.com/prime/citation/42312477/Strain-Driven_Altermagnetic_Spin-Splitting_Effect_in_RuO2.
DB - PRIME
DP - Unbound Medicine
ER -
