Field-induced multipolar character in the dipolar ground state of the honeycomb rare-earth chalcohalide NdOF
Abstract
Field-tunable reconstruction of crystalline electric field (CEF) doublets offers a promising avenue for inducing multipolar character, while its observation in real materials has been little explored so far. Here we establish the honeycomb rare-earth chalcohalide NdOF as such a platform. Raman spectroscopy identifies four CEF excitations at 1.7, 15.6, 19.2, and 80.9~meV, and a Zeeman--CEF analysis reproduces their nonlinear field splitting into seven branches. Magnetization and susceptibility over 0.1--9~T are well described by a CEF model for the total angular momentum manifold, confirming the robustness of the extracted CEF scheme. These results demonstrate a field-driven continuous evolution of the ground-state doublet from dipolar to dipolar-multipolar character, with pressure providing a complementary tuning knob, establishing NdOF as a model system for exploring the controlled induction of multipolar components in rare-earth magnets.
Comments: 7 pages, 4 figures
Cite
@article{arxiv.2605.29896,
title = {Field-induced multipolar character in the dipolar ground state of the honeycomb rare-earth chalcohalide NdOF},
author = {Tiantian Liu and Yanzhen Cai and Mingtai Xie and Helin Mei and Anmin Zhang and Feng Jin and Jianting Ji and Zheng Zhang and Qingming Zhang},
journal= {arXiv preprint arXiv:2605.29896},
year = {2026}
}