Open AccessРоль зарядового состояния поверхностных атомов металлической подложки в допировании квазисвободного графена
Author(s) -
С.Ю. Давыдов,
А.А. Лебедев,
Ю.В. Любимова
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.23.47015.17347
Subject(s) - graphene , electric field , substrate (aquarium) , materials science , doping , charge (physics) , condensed matter physics , simple (philosophy) , double layer (biology) , metal , layer (electronics) , nanotechnology , physics , quantum mechanics , philosophy , oceanography , epistemology , geology , metallurgy
AbstractTo determine the effect of a metal substrate on the electronic state of quasi-free-standing graphene, a simple model taking into account the presence of the double electric layer on the metal surface is proposed. The arising electrostatic field shifts the Dirac point of graphene, which leads to its doping. An analytical expression for the charge of graphene atoms is obtained. Numerical estimations are made for (111) faces of Cu, Ag, Au, and Pt. The agreement of the obtained estimations with the available results of numerical calculations is discussed.