Phonon Anharmonicity in Cu-Based Layered Thiophosphates
Phonon Anharmonicity in Cu-Based Layered Thiophosphates
In this work, we performed temperature-dependent Raman spectroscopy studies on single crystals of three layered metal thiophosphates: CuInP2S6, CuCrP2S6, and CuInP2S6-In4/3P2S6 heterostructures. These materials are emerging multiferroics, with CuInP2S6 and CuInP2S6-In4/3P2S6 exhibiting room temperature ferrielectric polarization while CuCrP2S6 is both anti-ferroelectric and antiferromagnetic at low temperatures (<145 and <30 K, …