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Tuning dimensionality in van-der-Waals antiferromagnetic Mott insulators TM PS3

DOI: 10.1088/1361-648X/ab5be8 DOI Help

Authors: Matthew John Coak (University of Warwick) , David M. Jarvis (University of Cambridge) , Hayrullo Hamidov (University of Cambridge) , Charles Haines (University of Cambridge) , Patricia Lebre Alireza (University of Cambridge) , Cheng Liu (University of Cambridge) , Suhan Son (Seoul National University) , Inho Hwang (Seoul National University) , Giulio I. Lampronti (University of Cambridge) , Dominik Daisenberger (Diamond Light Source) , Paul Nahai-williamson (University of Cambridge) , Andrew Wildes (Institut Laue-Langevin) , Siddharth S. Saxena (University of Cambridge) , J.-g. Park (Seoul National University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics: Condensed Matter

State: Published (Approved)
Published: November 2019
Diamond Proposal Number(s): 21368

Open Access Open Access

Abstract: We present an overview of our recent work in tuning and controlling the structural, magnetic and electronic dimensionality of 2D van-der-Waals antiferromagnetic compounds (Transition-Metal)PS3. Low-dimensional magnetic systems such as these provide rich opportunities for studying new physics and the evolution of established behaviours with changing dimensionality. These materials can be exfoliated to monolayer thickness and easily stacked and combined into functional heterostructures. Alternatively, the application of hydrostatic pressure can be used to controllably close the van-der-Waals interplanar gap and tune the crystal structure and electron exchange paths towards a 3D nature. We collect and discuss trends and contrasts in our data from electrical transport, Raman scattering and synchrotron x-ray measurements, as well as insight from theoretical calculations and other results from the literature. We discuss structural transitions with pressure common to all materials measured, and link these to Mott insulator-transitions in these compounds at high pressures. Key new results include magnetotransport and resistivity data in the high-pressure metallic states, which show potentially interesting qualities for a new direction of future work focused on low temperature transport and quantum critical physics.

Subject Areas: Materials, Physics

Instruments: I15-Extreme Conditions