Colossal Spin--Lattice--Charge Coupling in Noncollinear Ferrimagnetic NbMnX2 (X = S, Se, Te) Monolayers
Abstract
Noncollinear ferrimagnets combine a net magnetic moment with internal spin degrees of freedom, creating opportunities to couple magnetic, mechanical, thermal, and electronic responses. Using first-principles calculations, symmetry analysis, atomistic spin simulations, and transport modeling, we identify stable NbMnX2 (X = S, Se, Te) monolayers with noncollinear ferrimagnetic ground states and Curie temperatures up to 313 K. Competing exchange, Dzyaloshinskii--Moriya interactions, and magnetic anisotropy produce field-responsive canted states that couple strongly to the lattice and charge carriers. Magnetization rotation changes the elastic modulus of NbMnTe2 by up to 36\%, while lattice entropy substantially enhances the near-room-temperature magnetocaloric response of NbMnS2 and NbMnSe2. In NbMnSe2, rotation restores a mirror-protected crossing, continuously closes an approximately 0.13 eV gap, and produces a conductivity-based anisotropic magnetoresistance ratio up to 10,000\% at 100 K. The combined results establish noncollinear NbMnX2 monolayers as a multifunctional platform for two-dimensional spintronics, nanomechanics, and thermal control.
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BibTeX
@misc{wang2026colossal,
title = {{Colossal Spin--Lattice--Charge Coupling in Noncollinear Ferrimagnetic NbMnX$_2$ ($X$ = S, Se, Te) Monolayers}},
author = {Peng Wang and Nanshu Liu and Hongkuan Yuan and Xue Jiang and Jijun Zhao},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.17849},
eprint = {2610.17849},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.17849},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Colossal Spin--Lattice--Charge Coupling in Noncollinear Ferrimagnetic NbMnX_2 (X = S, Se, Te) Monolayers
AU - Peng Wang
AU - Nanshu Liu
AU - Hongkuan Yuan
AU - Xue Jiang
AU - Jijun Zhao
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2610.17849
UR - https://arxiv.org/abs/2610.17849
AB - Noncollinear ferrimagnets combine a net magnetic moment with internal spin degrees of freedom, creating opportunities to couple magnetic, mechanical, thermal, and electronic responses. Using first-principles calculations, symmetry analysis, atomistic spin simulations, and transport modeling, we identify stable NbMnX_2 (X = S, Se, Te) monolayers with noncollinear ferrimagnetic ground states and Curie temperatures up to 313 K. Competing exchange, Dzyaloshinskii--Moriya interactions, and magnetic anisotropy produce field-responsive canted states that couple strongly to the lattice and charge carriers. Magnetization rotation changes the elastic modulus of NbMnTe_2 by up to 36\%, while lattice entropy substantially enhances the near-room-temperature magnetocaloric response of NbMnS_2 and NbMnSe_2. In NbMnSe_2, rotation restores a mirror-protected crossing, continuously closes an approximately 0.13 eV gap, and produces a conductivity-based anisotropic magnetoresistance ratio up to 10,000\% at 100 K. The combined results establish noncollinear NbMnX_2 monolayers as a multifunctional platform for two-dimensional spintronics, nanomechanics, and thermal control.
ER -