Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 49: Graphene and 2D Materials (joint session TT/HL)
TT 49.12: Vortrag
Donnerstag, 20. März 2025, 18:00–18:15, H33
Pressure-induced structural phase transitions in the van der Waals multiferroic CuCrP2S6 — •Swarnamayee Mishra1 and Jochen Geck1,2 — 1Institute for Solid State and Materials Physics, TU Dresden, D-01062 Dresden, Germany — 2Würzburg-Dresden Cluster of Excellence ct.qmat, TU Dresden, D-01062 Dresden, Germany
Two-dimensional (2D) crystals with strong in-plane covalent bonds and weak van der Waals (vdW) interlayer interactions have garnered significant attention following the discovery of graphene and its remarkable properties. CuCrP2S6 (CCPS) is a promising 2D material exhibiting antiferromagnetic behavior due to the collective ordering of Cr3+ spins and antiferroelectric properties driven by Cu+ ion ordering. As a type-I multiferroic, CCPS is particularly notable for its coexistence of antiferroelectricity and antiferromagnetism, coupled with strong polarization-magnetization interactions. These ferroic properties arise from spin-orbit coupling associated with crystal symmetry breaking. Despite its potential, a detailed pressure-dependent crystallographic study of CCPS remains unexplored. In this work, we address this gap using high-pressure single-crystal X-ray diffraction (XRD) to investigate the interplay between structural changes and the material’s ferroic behaviors. Our study reveals a phase transition from the low-pressure monoclinic Pc phase to the high-pressure monoclinic C2/c phase at low temperatures, providing new insights into the structure-property relationships of this promising 2D vdW material.
Keywords: van der Waals Materials; Multiferroicity; pressure dependent X-ray diffraction; structure-property relationship