Specific features of chemisorption on a size-quantized film in an external quantizing magnetic field

On the theory of electronic states of the “epitaxial graphene-quantum-well film” system

“…Thus, the magnitude of the transferred charge in the "epitaxial graphene-quantum well film" system substantially depends on the thickness of the film and the applied magnetic field. The dependence of the transferred charge on the magnetic field qualitatively coincides with the result obtained in [16], where this problem was investigated for an individual adatom. The dependence of the transferred charge on the film thickness, in contrast to the data presented in [16], decreases as the thickness of the film increases.…”

“…This is associated with the possi bility of varying the properties of low dimensional structures and also with the fact that these low dimen sional structures can be used to fabricate solid state structures with controllable parameters [16][17][18][19][20], which, in turn, is interesting from the viewpoint of the possibility of producing a controlled effect on the elec tronic states of graphene. It should be noted, however, that the problem of investigation of the "graphenelow dimensional structure" system, as compared to the case of the "graphene-macroscopic structure" system, has a different aspect.…”

“…In this regard, we write the general expres sions derived in the framework of the Green's function technique within the Kadanoff-Baym formalism as applied to the chemisorption of an individual atom on the surface of the film [16,21]. The initial equations have the following form:…”

“…When the film potential is approximated by a rectangular well with infinitely high walls, we obtain the following expression for the Fermi energy and the film thickness for which the (i + 1)st energy level is occupied [22]: (16) where N is the concentration of electrons in the film. Figure 2 presents the results of the numerical calcula tion of the dependence of the transferred charge on the reduced thickness of the film l = L/10 -10 m. In this case, we set /2 = 1.…”

Квантовые кинетические уравнения системы “графен + размерно-квантовая пленка”

“…Это связано с возмож-ностью варьирования свойств низкоразмерных структур и создания на их основе твердотельных структур с управляемыми параметрами [19]- [22], что, в свою оче-редь, интересно с точки зрения возможности создания управляемого воздействия на электронные состояния графена. Следует отметить, однако, что исследование системы "графен-низкоразмерная структура", в отличие от системы "графен-мак-роскопическая структура", имеет иные аспекты.…”