AI Article Synopsis
- Researchers found that the antiferromagnetic structure of MnBiTe with three layers of MnTe is stable and has a magnetic energy difference that is four times greater than that in a single layer.
- The Néel transition point, which is the temperature at which magnetism changes, is raised to 102.5 K, making it usable above the temperature of liquid nitrogen.
- The study reveals a transformation in topological properties from non-trivial to trivial phases as the number of MnTe layers increases and highlights the potential of MnBiTe as a platform for advanced magnetically topological devices.
Article Abstract
The Mn-Bi-Te family displaying magnetism and non-trivial topological properties has received extensive attention. Here, we predict that the antiferromagnetic structure of MnBiTewith three MnTe layers is energetically stable and the magnetic energy difference of Mn-Mn is enhanced four times compared with that in the single MnTe layer of MnBiTe. The predicted Néel transition point is raised to 102.5 K, surpassing the temperature of liquid nitrogen. The topological properties show that with the variation of the MnTe layer from a single layer to three layers, the system transforms from a non-trivial topological phase to a trivial topological phase. Interestingly, the ferromagnetic state of MnBiTeis a topological semimetal and it exhibits a topological transition from trivial to non-trivial induced by the magnetic transition. Our results enrich the Mn-Bi-Te family system, offer a new platform for studying topological phase transitions, and pave a new way to improve the working temperature of magnetically topological devices.
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| http://dx.doi.org/10.1088/1361-648X/ad136d | DOI Listing |
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