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PUBLICATIONS

Spin-lattice entanglement in CoPS3

Published

Author(s)

Angela Hight Walker, Kevin Garrity, Rebecca Dally

Abstract

Complex chalcogenides in the MPS3 family of materials (M = Mn, Fe, Co, and Ni) display remarkably different phase progressions depending upon the metal center orbital filling, character of the P–P linkage, and size of the van der Waals gap. There is also a stacking pattern and spin state difference between the "lighter" and "heavier" transition metal-containing systems that places CoPS3 at the nexus of these activities - even though this compound is under-explored from a properties point of view. Here, we bring together Raman scattering and infrared absorption spectroscopies with x-ray techniques to identify a structural aspect to the 119 K magnetic ordering transition as well as a remarkable lower temperature set of magnon-phonon pairs that engage in avoided crossings along with a magnetic scattering continuum that correlates with phonon lifetime effects. These findings point to strong spin-phonon entanglement as well as opportunities to control these effects under external stimuli.
Citation
PNAS
Pub Type
Journals

Keywords

Raman scattering, infrared absorption, 2D, magnetic order, spin, phonon, magnon, entanglement
Physics, Nanotechnology, Metrology and Materials

Citation

Hight Walker, A. , Garrity, K. and Dally, R. (2025), Spin-lattice entanglement in CoPS3, PNAS (Accessed October 9, 2025)

Issues

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Created June 10, 2025, Updated June 12, 2025
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