Powder X-ray diffraction of van der Waals compound CuInP2S6 under pressures from 2.0−10.8 GPa
Abstract
A synchrotron powder X-ray diffraction experiment observed a monoclinic Cc → a trigonal P31c structural transition of 2D van der Waals ferroic compound CuInP2S6 near 5.8 GPa and room temperature. The lattice constants a, b, and c in the Cc phase decrease with pressure, while the monoclinic angle β increases. Near the transition pressure, a, c and β saturate. These parameters collapse upon crossing the transition, but the van der Waals gap is almost constant crossing the phase boundary. This observation suggests that the P31c phase maintains the van der Waals nature, and the inter-layer sliding drives the structural transition.
Downloads
Published
Issue
Section
License
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.
