Corso Martina, Menchón Rodrigo E, Piquero-Zulaica Ignacio, Vilas-Varela Manuel, Ortega J Enrique, Peña Diego, Garcia-Lekue Aran, de Oteyza Dimas G
Centro de Física de Materiales (MPC), CSIC-UPV/EHU, 20018 San Sebastián, Spain.
Donostia International Physics Center (DIPC), 20018 San Sebastián, Spain.
Nanomaterials (Basel). 2021 Dec 6;11(12):3303. doi: 10.3390/nano11123303.
Chiral graphene nanoribbons are extremely interesting structures due to their narrow band gaps and potential development of spin-polarized edge states. Here, we study their band structure on low work function silver surfaces. The use of a curved Ag single crystal provides, within the same sample, regions of disparate step structure and step density. Whereas the former leads to distinct azimuthal growth orientations of the graphene nanoribbons atop, the latter modulates the substrate's work function and thereby the interface energy level alignment. In turn, we disclose the associated charge transfer from the substrate to the ribbon and assess its effect on the nanoribbon's properties and the edge state magnetization.
手性石墨烯纳米带因其窄带隙以及自旋极化边缘态的潜在发展而成为极具吸引力的结构。在此，我们研究它们在低功函数银表面的能带结构。使用弯曲的银单晶在同一样品中提供了具有不同台阶结构和台阶密度的区域。前者导致石墨烯纳米带在顶部有不同的方位生长取向，而后者调节衬底的功函数，从而调节界面能级排列。相应地，我们揭示了从衬底到纳米带的相关电荷转移，并评估其对纳米带性质和边缘态磁化的影响。
