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Updated: May 26, 2026
06:53
Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Defects That Magnetize Beyond Monolayer PtSe2
Ilias M Oikonomou1,2,3, Danielle Douglas-Henry2,3, Mohammadreza Daqiqshirazi1,4
1Faculty of Chemistry and Food Chemistry, Dresden University of Technology, Dresden, Germany.
Small (Weinheim an Der Bergstrasse, Germany)
|May 25, 2026
Summary
Defect engineering in multilayer platinum diselenide (PtSe2) creates robust magnetism. Complex defects restore magnetism, enabling tunable 2D half-metallic states for spintronics.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) materials offer potential for advanced spintronic and quantum devices.
- Achieving magnetism beyond the monolayer in 2D materials is a significant challenge.
Purpose of the Study:
- Investigate the emergence and control of magnetism in multilayer platinum diselenide (PtSe2).
- Explore defect engineering strategies to realize tunable magnetic properties in PtSe2.
Main Methods:
- Hybrid density functional theory (DFT) calculations.
- Aberration-corrected scanning transmission electron microscopy (AC-STEM).
Main Results:
- Magnetism in PtSe2 is typically quenched by interlayer interactions but restored by complex defects (Pt vacancy + PtSe antisite).
- These defects induce magnetic moments up to 3.16 µB and create 2D half-metallic states in bilayer PtSe2.
- Se vacancies tune magnetic properties and extend magnetic moments in trilayer PtSe2.
Conclusions:
- Defect engineering provides a method for robust magnetic phase control in PtSe2 without external doping or strain.
- PtSe2 serves as a tunable platform for room-temperature spintronic and valleytronic applications.
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