Pressure induced electronic and structural phase evolution in Van der Waals compound FePS$₃$

Haines, C. R. S. and Coak, M. J. and Wildes, A. R. and Lampronti, G. I. and Liu, C. and Nahai-Williamson, P. and Hamidov, H. and Daisenberger, D. and Saxena, S. S. (2018) Pressure induced electronic and structural phase evolution in Van der Waals compound FePS$₃$. Physical Review Letters, 121 (266801). ISSN 0031-9007 ESSN: 1079-7114 DOI

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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.

Item Type: Article
Uncontrolled Keywords: 2018AREP; IA74
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
08 - Green Open Access
Journal or Publication Title: Physical Review Letters
Volume: 121
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 07 Jan 2019 22:07
Last Modified: 07 Jan 2019 22:07

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