Year: 2026
Type: preprint
Abstract: Hydrostatic pressure commonly suppresses polarization in conventional displacive ferroelectrics by weakening the off-center ionic distortion. Sliding ferroelectrics may provide a contrasting case because their polarization arises from stacking-dependent interlayer charge transfer rather than intra-unit-cell ionic displacement. Here, hydrostatic pressure is shown to enhance, rather than suppress, the polarization of parallel-stacked bilayer boron nitride, a prototypical sliding ferroelectric. A graphene layer placed on top of a ferroelectric boron nitride bilayer is used for sensing the evolution of polarization under pressure. The pressure enhances both the interlayer potential and the ferroelectric polarization, with the latter increasing approximately linearly by 80% up to 1.66GPa. These results establish hydrostatic compression as a tuning parameter for sliding-ferroelectric polarization, with potential implications for ultrathin slidetronic memory devices.
Source: arXiv (Cornell University)
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Ministry of Education, Culture, Sports, Science and Technology, Cornell Center for Materials Research, Japan Society for the Promotion of Science, Office of Naval Research, Basic Energy Sciences, Core Research for Evolutional Science and Technology
OpenAlex ID: W7214683735