Investigation of the atomic and electronic structures of highly ordered two-dimensional germanium on Au(111)

Abstract

Low energy electron diffraction (LEED), scanning tunneling microscopy (STM), and photoelectron spectroscopy have been used to study an ordered structure formed by Ge atoms deposited onto the Au(111) surface. Based on a careful analysis of STM images and LEED patterns, we propose a new unit cell for the atomic structure of the Ge layer. Core level data indicate that some Ge atoms diffuse into the Au(111) crystal during annealing after deposition at room temperature. This is further corroborated by angle resolved photoelectron spectroscopy measured for different amounts of Ge remaining after sputtering and annealing. The results of the ARPES study clearly exclude the interpretation, in the literature, of a parabolic band as part of a Dirac cone of germanene.

References in corpus (6)

• Germanene: a novel two-dimensional Germanium allotrope akin to Graphene and Silicene
• Structural and electronic properties of germanene on MoS${}_2$
• Germanene termination of Ge${}_2$Pt crystals on Ge(110)
• Tuning the electronic structures of silicene and germanene by biaxial strain and electric field
• Two-dimensional Dirac signature of germanene
• Coexistence of strongly buckled germanene phases on Al(111)

Cited by in corpus (3)

• Electronic structure of Au-Sn compounds grown on Au(111)
• Identifying the Alloy Structures of Germanene Grown on Al(111) Surface
• Moiré-modulated band gap and van Hove singularities in twisted bilayer germanene