Coherent terahertz control of metastable magnetization in FePS3
Abstract
Driving specific lattice modes with ultrafast stimuli offers a dynamic route for tailoring material properties out of equilibrium. However, achieving dynamic coherent control of the nonequilibrium phases via resonant excitation of lattice coherences remains largely unexplored. In this study, we demonstrate coherent phononic control of a newly discovered, light-induced metastable magnetization in the van der Waals antiferromagnet FePS ₃ . By using a sequence of terahertz (THz) pulses, we modulate the magnetization amplitude at the frequencies of phonon coherences, whose infrared-active nature and symmetries are further revealed by polarization- and field-strength-dependent measurements. Furthermore, our two-dimensional THz spectroscopy, in tandem with first-principles numerical simulations, shows that these phonons nonlinearly displace a Raman-active phonon, which induces the metastable net magnetization. These findings not only clarify the microscopic mechanism underlying the metastable state in FePS ₃ but also establish vibrational coherences in solids as a powerful tool for ultrafast quantum phase control, enabling manipulation of material functionalities far from equilibrium.
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BibTeX
@article{ilyas2026coherent,
title = {{Coherent terahertz control of metastable magnetization in FePS3}},
author = {Batyr Ilyas and Tianchuang Luo and Honglie Ning and Emil Viñas Boström and Alexander von Hoegen and Jaena Park and Junghyun Kim and Je-Geun Park and Angel Rubio and Nuh Gedik},
journal = {Nature Communications},
year = {2026},
month = oct,
doi = {10.1038/s41467-026-78164-x},
url = {https://www.nature.com/articles/s41467-026-78164-x},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Coherent terahertz control of metastable magnetization in FePS3
AU - Batyr Ilyas
AU - Tianchuang Luo
AU - Honglie Ning
AU - Emil Viñas Boström
AU - Alexander von Hoegen
AU - Jaena Park
AU - Junghyun Kim
AU - Je-Geun Park
AU - Angel Rubio
AU - Nuh Gedik
PY - 2026
DA - 2026/10/06
JO - Nature Communications
DO - 10.1038/s41467-026-78164-x
UR - https://www.nature.com/articles/s41467-026-78164-x
AB - Driving specific lattice modes with ultrafast stimuli offers a dynamic route for tailoring material properties out of equilibrium. However, achieving dynamic coherent control of the nonequilibrium phases via resonant excitation of lattice coherences remains largely unexplored. In this study, we demonstrate coherent phononic control of a newly discovered, light-induced metastable magnetization in the van der Waals antiferromagnet FePS ₃ . By using a sequence of terahertz (THz) pulses, we modulate the magnetization amplitude at the frequencies of phonon coherences, whose infrared-active nature and symmetries are further revealed by polarization- and field-strength-dependent measurements. Furthermore, our two-dimensional THz spectroscopy, in tandem with first-principles numerical simulations, shows that these phonons nonlinearly displace a Raman-active phonon, which induces the metastable net magnetization. These findings not only clarify the microscopic mechanism underlying the metastable state in FePS ₃ but also establish vibrational coherences in solids as a powerful tool for ultrafast quantum phase control, enabling manipulation of material functionalities far from equilibrium.
SN - 2041-1723
ER -