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This research investigates the phase transitions in MnBi2Te4 under varying pressure conditions and their implications for disorder.

February 2, 2026Nano LettersOpen Access

Pressure-Tunable Phase Transitions in Atomically Thin Chern Insulator MnBi ₂ Te ₄

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Magnetoresistance measurements reveal phase transitions in MnBi2Te4, suggesting disorder effects under pressure.

This research investigates the phase transitions in MnBi2Te4 under varying pressure conditions and their implications for disorder.
Conducted magnetoresistance measurements in the antiferromagnetic phase of MnBi2Te4.
Assessed the influence of hydrostatic pressure on interlayer and intralayer exchange coupling.
Analyzed the temperature and magnetic field dependence of the atomic structure.
Observed a trivial insulator state instead of a quantum anomalous Hall state due to disorder.
Identified a Chern insulator state at high magnetic fields.
Estimated enhancement of interlayer exchange coupling and reduction of the trivial band gap with increasing pressure.

Márffy et al. (2026) studied this question.

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