Tunable magnetism in nitride MXenes: consequences of atomic layer stacking

Area of Science:

• Materials Science
• Condensed Matter Physics
• Quantum Chemistry

Background:

• Two-dimensional materials like MXenes possess unique properties due to compositional flexibility.
• Nitride MXenes are less explored than carbide counterparts.
• Structural aspects and their influence on MXene properties are emerging research areas.

Purpose of the Study:

• Investigate the impact of stacking patterns on electronic and magnetic properties of nitride MXenes.
• Explore structure-property relationships in magnetism for M₂NT₂ compounds.
• Identify potential applications in magnetic devices.

Main Methods:

• Density Functional Theory (DFT) based calculations.
• Analysis of ground state and finite temperature magnetic properties.
• Examination of electronic structures and local symmetry.

Main Results:

• Stacking patterns substantially affect magnetic properties in M₂NT₂ MXenes (M = Sc, Ti, V, Cr, Mn; T = O, F).
• Electronic ground states are tunable via stacking pattern modifications.
• Tunability is linked to local symmetry, structural inhomogeneity, and electronic structures.

Conclusions:

• Stacking pattern engineering is a viable strategy to control electronic and magnetic properties of nitride MXenes.
• These findings pave the way for novel magnetic device applications.
• Understanding structure-property relationships is key for nitride MXene development.