Silicene-Like Domains on IrSi₃ Crystallites

Abstract

Recently, silicene, the graphene equivalent of silicon, has attracted a lot of attention due to its compatibility with Si-based electronics. So far, silicene has been epitaxy grown on various crystalline surfaces such as Ag (110), Ag(111), Ir(111), ZrB2(0001) and Au (110) substrates. Here, we present a new method to grow silicene via high temperature surface reconstruction of hexagonal IrSi3 nanocrystals. The h-IrSi3 nanocrystals are formed by annealing thin Ir layers on Si(111) surface. A detailed analysis of the STM images shows the formation of silicene like domains on the surface of some of the IrSi3 crystallites.We studied both morphology and electronic properties of these domains by using both scanning tunneling microscopy/spectroscopy and first-principles calculation methods.

Epitaxial growth and structural properties of silicene and other 2D allotropes of Si

“…138 Recently, it has been proposed that annealing of thin Ir/Si (111) at 1023 K leads to the formation of IrSi 3 nanocrystals. 41…”

“…138 Recently, it has been proposed that annealing of thin Ir/Si(111) at 1023 K leads to the formation of IrSi 3 nanocrystals. 41 Some of the crystallites present a hexagonal reconstruction (with size 23.1 Å) attributed to a reconstruction of silicene. 41 However the lattice constant deduced (4.37 Å) is far from the one of free-standing silicene.…”

“…41 Some of the crystallites present a hexagonal reconstruction (with size 23.1 Å) attributed to a reconstruction of silicene. 41 However the lattice constant deduced (4.37 Å) is far from the one of free-standing silicene.…”

“…138 Recently, it has been proposed that annealing of thin Ir/Si (111) at 1023 K leads to the formation of IrSi 3 nanocrystals. 41 silicene. 41 However the lattice constant deduced (4.37 Å) is far from the one of free-standing silicene.…”

Magnetic-Field-Driven Electron Dynamics in Graphene

“…As a result, it is unclear how the probability density of electron dynamics is distributed in momentum space when the magnetic field is applied. In our previous research, we have studied the electron dynamics in momentum space for silicon nanowires grown in different crystallographic directions. − The aim of this present study is to describe and understand the electron dynamics in graphene under the influence of an external magnetic field. Electron dynamics of probability density is mapped with time propagation in 2D momentum space, allowing for a separation of the different microscopic steps.…”