Energy-momentum mapping ofd-derived Au(111) states in a thin film

Abstract

The quantum well states of a film can be used to sample the electronic structure of the parent bulk material and determine its band parameters. We highlight the benefits of two-dimensional film band mapping, with respect to complex bulk analysis, in an angle-resolved photoemission spectroscopy study of the 5d states of Au(111). Discrete 5d-derived quantum well states of various orbital characters form in Au (111)

Effective mass enhancement and ultrafast electron dynamics of Au(111) surface state coupled to a quantum well

“…In particular, the dark hexagonal spots are surface features of only 1 to 2 monolayers (MLs) deep. In agreement with previous studies on Au quantum films [23], the Rashba-type spin-orbit splitting of the SS is not observed. We attribute this effect to an enhanced electron scattering at a network of surface distortions occurring due to strain, which is induced in the Au film by the low-symmetric W(110) substrate.…”

“…6(a) and 6(b) provides for the 7-nm (3.5-nm) film τ l = 511(600) ± 44(48) fs and z = 27(38) ± 5 (7), which supports the description of Au quantum films on W(110) in the framework of the jellium model [31]. The fact that screening effects by Au d electrons are not taken into account make the model nevertheless applicable to our system since the d bands in quantum wells are suppressed due to electron confinement [23,36,37].…”

Finding the hidden valence band of N = 7 armchair graphene nanoribbons with angle-resolved photoemission spectroscopy

“…The sub-bands with lower energies are not visible because of overlap with the substrate states. The Au sp-and d-states, as well as the surface state (ss) and surface resonance (sr) are marked [53]. (1 1 1) and graphene, correspondingly.…”

Nonlinear optical response of a gold surface in the visible range: A study by two-color sum-frequency generation spectroscopy. III. Simulations of the experimental SFG intensities

“…The theoretical and experimental literature on surface states in metals is abundant, 7,8 and this topic is still an active field of research. 23,24 They have to be taken into account as far as surface processes are concerned since, for example, 22% of the electrons in the surface layer of Ag(100) are found in surface states or resonances. 25 Intrinsic surface states appear as special solutions of the Schrödinger equations for electrons inside the metal, which, unlike the bulk solutions, exponentially decay on both sides of the interface between the metal and the exterior, thus maximizing their wavefunction at the vicinity of the surface.…”