Structural and electronic phase transitions in FePS${}_3$ under the application of pressure

Abstract

Two-dimensional materials have proven to be a prolific breeding ground of new and unstudied forms of magnetism and unusual metallic states, particularly when tuned between their insulating and metallic phases. In this paper we present work on a new metal to insulator transition system FePS${}_3$ . This compound is a two-dimensional van-der-Waals antiferromagnetic Mott insulator. Here we report the discovery of an insulator-metal transition in FePS${}_3$, as evidenced by x-ray diffraction and electrical transport measurements, using high pressure as a tuning parameter. Two structural phase transitions are observed in the x-ray diffraction data as a function of pressure and resistivity measurements show evidence of onset of a metallic state at high pressures. We propose models for the two new structures that can successfully explain the x-ray diffraction patterns.

9 pages, 12 figures

References in corpus (2)

• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Viewpoint: Opportunities and challenges of two-dimensional magnetic van der Waals materials: magnetic graphene?

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