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Tuning dimensionality in van-der-Waals antiferromagnetic Mott insulators TMPS3
M J Coak1, D M Jarvis2, H Hamidov2,3,4
1Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 27, 2019
Summary
We explored tuning the dimensionality of 2D van-der-Waals antiferromagnets, (Transition-Metal)PS3. Applying pressure induced structural transitions and Mott insulator behavior, revealing metallic states with quantum critical potential.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Low-dimensional van-der-Waals antiferromagnetic compounds, specifically (Transition-Metal)PS3, offer unique platforms for fundamental physics research.
- Their properties are sensitive to dimensionality, which can be tuned via exfoliation or hydrostatic pressure.
Purpose of the Study:
- To investigate the effects of dimensionality control on the structural, magnetic, and electronic properties of (Transition-Metal)PS3 compounds.
- To explore the evolution of these materials from 2D to 3D under hydrostatic pressure.
Main Methods:
- Electrical transport measurements
- Raman scattering spectroscopy
- Synchrotron X-ray diffraction
- Theoretical calculations
Main Results:
- Hydrostatic pressure induces common structural transitions across measured (Transition-Metal)PS3 materials.
- These transitions are linked to Mott insulator-to-metal transitions at high pressures.
- Magnetotransport and resistivity data in high-pressure metallic states indicate potential for quantum critical phenomena.
Conclusions:
- Dimensionality tuning, particularly via pressure, is an effective strategy to modify the physical properties of van-der-Waals antiferromagnets.
- The observed high-pressure metallic states in (Transition-Metal)PS3 compounds warrant further investigation into low-temperature transport and quantum criticality.
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