High-buckled 3×3 stanene with a topologically nontrivial energy gap
High-buckled 3×3 stanene with a topologically nontrivial energy gap
复制标题
DOI：
10.1088/1361-6463/abfce8
复制
发表时间：
2017-07
期刊：
影响因子：
--
通讯作者：
Ye-Heng Song;Zhi-Wen Wang;Zhen-Yu Jia;Xin-Yang Zhu;Zhi-Qiang Shi;Li Zhu;Qian-Qian Yuan-Qian;D. Shu;Shao‐Chun Li
中科院分区：
文献类型：
--
作者：
Ye-Heng Song;Zhi-Wen Wang;Zhen-Yu Jia;Xin-Yang Zhu;Zhi-Qiang Shi;Li Zhu;Qian-Qian Yuan-Qian;D. Shu;Shao‐Chun Li
我们展示了一种有效的方法来调整stanene中的原子屈曲以打开拓扑上非平凡的能隙。通过调整生长动力学，我们在Bi（111）衬底上获得了意想不到的高屈曲3×3 stanene。扫描隧道显微镜研究结合密度泛函理论计算证实3×3 stanene为1 × 1扭曲结构，每3个1 × 1单元胞中有一个高屈曲的Sn。高屈曲3×3 stanene有利于Γ点的大能带反转，自旋-轨道耦合打开了拓扑上不平凡的能隙。本研究提供了一种调整单层拓扑材料拓扑结构的替代方法。
We demonstrate an efficient way of tuning the atomic buckling in stanene to open a topologically nontrivial energy gap. By tuning the growth kinetics, we obtain an unexpected high-buckled 3×3 stanene on the Bi(111) substrate. Scanning tunneling microscopy study combined with density functional theory calculation confirms that the 3×3 stanene is a distorted 1 × 1 structure with a high-buckled Sn in every three 1 × 1 unit cells. The high-buckled 3×3 stanene favors a large band inversion at the Γ point, and the spin–orbit coupling opens a topologically nontrivial energy gap. This study provides an alternate way to tune the topology of monolayer topological materials.