“…Different insulating films have already been applied, ranging from ionic salts such as NaCl [8,9], KCl [10,11], or KBr [12], through oxide [13] or nitride [14] layers to molecular wetting layers [15] and two-dimensional materials, such as graphene [16,17], hBN [11,18], or even organic layers [19]. Recently, it has been proposed that a monolayer of transition metal dichalcogenides, for example, MoS 2 , may play a similar role [4,20,21].…”