Pressure-induced electronic and structural phase evolution in the van der Waals compound FePS3

C. R. S. Haines, Matthew J. Coak, Andrew R. Wildes, Giulio I. Lampronti, Cheng Liu, Paul Nahai-Williamson, Hayrullo Hamidov, Dominik Daisenberger, Siddharth S. Saxena

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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 FePS3 . This compound is a two-dimensional van-der-Waals antiferromagnetic Mott insulator. Here we report the discovery of an insulator-metal transition in FePS3, 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 the 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.
Original languageEnglish
Article number266801
Number of pages6
JournalPhysical Review Letters
Volume121
DOIs
Publication statusPublished - 28 Dec 2018

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