Gallenene epitaxially grown on Si(1 1 1)

Abstract

Gallenene, an analogue of graphene composed of gallium, is epitaxially grown on Si(1 1 1) surface and studied by low temperature scanning tunneling microscopy (LT-STM). The STM images display that the buffer layer has a superstructure with respect to the substrate lattice and the gallenene layer has a hexagonal honeycomb structure. The scanning tunneling spectra (STS) of the gallenene show that it behaves as a metallic layer. First-principles calculations give the proposed configuration. Our results provide a method to synthesize the gallenene and shed important light on the growth mechanism of it.

Recent Progress on Two-Dimensional Materials

“…The name Xenes derives from graphene, the first and most studied 2D material. Beyond graphene and its derivatives, over a dozen emerging Xenes, including antimonene, arsenene, bismuthine, borophene, BP, gallenene, germanene, silicene, and tellurene, have been experimentally realized, while others like aluminene and indiene are still in theoretically prediction, as summarized in Table 1 90,199,[294][295][296][297][298][299][300][301][302][303][304][305][306][307][308] . Xenes have attracted a considerable amount of recent attention due to distinct properties and performances across various research fields.…”

“…* represents theoretical exploration. The experimental realization and theoretical prediction can be found in references 90,199,[294][295][296][297][298][299][300][301][302][303][304][305][306][307][308] . resorcinol units with ESIPT property into COFs system 342 , a kind of luminescent COFs with dual emission properties are developed, in which the dual emission of COFs originates from the enol state and ESIPT emission, respectively.…”

Modulating the thermal and structural stability of galleneneviavariation of atomistic thickness

“…23 Due to 2D Ga having dangling covalent bonds, this material is able to bond covalently to a substrate material. 20,25,26 However, an important property of 2D Ga that remains unexplored before it can be used effectively in electronic applications is a robust understanding of the material's thermal stability.…”

Advances in photonics of recently developed Xenes

“…Similar to borophene, gallenene can also be stably grown on substrates, and the stability is closely related to the adopted substrate because of the strong chemical interaction between gallenene and substrates confirmed theoretically and experimentally. By the epitaxial growth technique, a gallenene buffer layer with a superstructure was firstly formed on Si(111) substrate, then the hexagonal honeycomb gallenene layer was grown on it as confirmed by low-temperature STM, making it possible to be applied in FET [66]. Furthermore, the stability of gallenene is layerdependent.…”