Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea.
Korea Research Institute of Standards and Science, Daejeon, 34113, Korea.
Sci Rep. 2017 Aug 4;7(1):7279. doi: 10.1038/s41598-017-07518-9.
Based on the first-principles evolutionary materials design, we report a stable boron Kagome lattice composed of triangles in triangles on a two-dimensional sheet. The Kagome lattice can be synthesized on a silver substrate, with selecting Mg atoms as guest atoms. While the isolated Kagome lattice is slightly twisted without strain, it turns into an ideal triangular Kagome lattice under tensile strain. In the triangular Kagome lattice, we find the exotic electronic properties, such as topologically non-trivial flat band near the Fermi energy and half-metallic ferromagnetism, and predict the quantum anomalous Hall effect in the presence of spin-orbit coupling.
基于第一性原理的演化材料设计，我们报告了一个由二维片上三角形中的三角形组成的稳定的硼 Kagome 格子。Kagome 格子可以在银基底上通过选择 Mg 原子作为客体原子来合成。孤立的 Kagome 格子在没有应变的情况下略有扭曲，但在拉伸应变下会变成理想的三角形 Kagome 格子。在三角形 Kagome 格子中，我们发现了奇异的电子性质，例如在费米能级附近的拓扑非平凡平带和半金属铁磁性，并预测了在存在自旋轨道耦合的情况下的量子反常霍尔效应。
