Magnetic properties and excitation spectrum of the S = 1/2 three-legged spin ladder, LiMoOP2O7
Abstract
We report a comprehensive experimental study including density functional theory calculations detailing the magnetic ground state of the S = 1/2 Mo5+ pyrophosphate, LiMoOP2O7, and its magnetic excitations. Neutron powder diffraction measurements confirm the P21/n structural model which is comprised of a three-legged ladder of distorted Mo5+ octahedra. Magnetometry and specific heat reveal a long-range magnetic ordering transition at TN = 3.5~K and a field-induced transition at μ0Hc = 1 T. This zero-field long-range magnetic order was determined to be a commensurate κ= 0 order with an ordered moment that is reduced from the full S = 1/2 magnetic moment by 30%. Through inelastic neutron scattering measurements and density functional theory calculations, we define the minimal microscopic model and resolve the spin Hamiltonian up to the seventh leading exchange parameter, resulting in a model with dominant antiferromagnetic leg interactions, weaker ferromagnetic rung interactions, and a significant interlayer ferromagnetic coupling.
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BibTeX
@misc{abdeldaim2026magnetic,
title = {{Magnetic properties and excitation spectrum of the S = 1/2 three-legged spin ladder, LiMoOP2O7}},
author = {Aly H Abdeldaim and Alexander A. Tsirlin and Jacques Ollivier and Clemens Ritter and Robin S. Perry and Lucy Clark and Gøran J. Nilsen},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.16856},
eprint = {2610.16856},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.16856},
}
RIS
TY - UNPB
TI - Magnetic properties and excitation spectrum of the S = 1/2 three-legged spin ladder, LiMoOP2O7
AU - Aly H Abdeldaim
AU - Alexander A. Tsirlin
AU - Jacques Ollivier
AU - Clemens Ritter
AU - Robin S. Perry
AU - Lucy Clark
AU - Gøran J. Nilsen
PY - 2026
DA - 2026/10/12
PB - arXiv
DO - 10.48550/arxiv.2610.16856
UR - https://arxiv.org/abs/2610.16856
AB - We report a comprehensive experimental study including density functional theory calculations detailing the magnetic ground state of the S = 1/2 Mo^5+ pyrophosphate, LiMoOP2O7, and its magnetic excitations. Neutron powder diffraction measurements confirm the P2_1/n structural model which is comprised of a three-legged ladder of distorted Mo^5+ octahedra. Magnetometry and specific heat reveal a long-range magnetic ordering transition at T_N = 3.5~K and a field-induced transition at μ_0H_c = 1 T. This zero-field long-range magnetic order was determined to be a commensurate κ= 0 order with an ordered moment that is reduced from the full S = 1/2 magnetic moment by 30%. Through inelastic neutron scattering measurements and density functional theory calculations, we define the minimal microscopic model and resolve the spin Hamiltonian up to the seventh leading exchange parameter, resulting in a model with dominant antiferromagnetic leg interactions, weaker ferromagnetic rung interactions, and a significant interlayer ferromagnetic coupling.
ER -