Metal-to-insulator transition in two-dimensional ferromagnetic monolayer induced by substrate*

Project supported by the National Natural Science Foundation of China (Grant No. 11574223), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20150303), and the Jiangsu Specially-Appointed Professor Program of Jiangsu Province, China.

Qi Can1, 2, Hu Jun1, 2, †
       

(color online) (a) Spin density of TaTe/Al2O3(0001) with cutoff of ±0.3 e3. Top panel: parallel to the surface and crossing the Ta atoms; bottom panel: perpendicular to the TaTe monolayer and crossing one of the Ta–Te bonds. (b)–(d) Band structures of (a) TaS/Al2O3(0001), (b) TaSe/Al2O3(0001), and (c) TaTe/Al2O3(0001). The black and red curves stand for bands in majority and minority spin channels, respectively. The horizontal dashed lines indicate the Fermi energy.