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Pressure-induced insulator-to-metal transition in the van der Waals compound <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>CoPS</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
We have studied the insulator-to-metal transition and crystal structure evolution under high pressure in the van der Waals compound ${\mathrm{CoPS}}_{3}$ through in situ electrical resistance, Hall resistance, magnetoresistance, x-ray diffraction, and Raman scattering measurements. ${\mathrm{CoPS}}_{3}$ exhibits a $C2/m\ensuremath{\rightarrow}P\overline{3}$ structural transformation at 7 GPa accompanied by a $2.9%$ reduction in the …