Voloshina Elena, Dedkov Yuriy
Department of Physics , Shanghai University , 99 Shangda Road , 200444 Shanghai , China.
Physical and Theoretical Chemistry , Freie Universität Berlin , 14195 Berlin , Germany.
J Phys Chem Lett. 2019 Jun 20;10(12):3212-3216. doi: 10.1021/acs.jpclett.9b00893. Epub 2019 May 31.
An elegant approach for the synthesis of graphene on the strong ferromagnetic (FM) material MnGe is proposed via intercalation of Mn in the graphene-Ge(111) interface. According to the density functional theory calculations, graphene in this strongly interacting system demonstrates the large exchange splitting of the graphene-derived π band. In this case, only spin-up electrons in graphene preserve the Dirac-electron-like character in the vicinity of the Fermi level and the K point, whereas such behavior is not detected for the spin-down electrons. This unique feature of the studied gr-FM-MnGe interface that can be prepared on the semiconducting Ge can lead to its application in spintronics.
通过在石墨烯 - Ge(111) 界面插入锰，提出了一种在强铁磁（FM）材料 MnGe 上合成石墨烯的巧妙方法。根据密度泛函理论计算，在这个强相互作用体系中的石墨烯表现出石墨烯衍生的 π 带的大交换分裂。在这种情况下，石墨烯中只有自旋向上的电子在费米能级和 K 点附近保持类似狄拉克电子的特性，而自旋向下的电子则未检测到这种行为。这种可以在半导体 Ge 上制备的研究中的 gr - FM - MnGe 界面的独特特性可能会导致其在自旋电子学中的应用。
