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Novel magnetic topological insulator FeBiTe with controllable topological quantum phase
Here, we report a new intrinsic magnetic topological insulator FeBiTe
based on first-principles calculations and it can achieve a rich topological
phase under pressure modulation. Without pressure, we predict that both
FeBiTe ferromagnetic and antiferromagnetic orders are non-trivial
topological insulators. Furthermore, FeBiTe of FM-z order will undergo
a series of phase transitions from topological insulator to semimetals and then
to trivial insulator under pressure. Finally, we further clarify and verify
topological phase transitions with low-energy effective model calculations.
This topological phase transition process is attributed to the synergy of the
magnetic moment and the spin-orbit coupling. The unique topological properties
of FeBiTe will be of great interest in driving the development of
quantum effects
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