Origin of optical anisotropy in noble metal (110) surfaces: theory

Mebarki, M.; Ziane, A.; Bouarab, S.; Khan, M.A. Majeed

doi:10.1016/s0039-6028(00)00258-2

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…In a series of papers, Ziane and co-workers [178][179][180] have performed calculations of the RAS of the Cu(110), Ag (110) and Au(110) surfaces within a scheme similar to that of Monachesi et al [177], and they reach similar conclusions, stressing the importance of transitions between parallel surface bands. They conclude that there are two contributions to the prominent 2 eV peak in the RAS of Cu(110), a view confirmed by an experimental study of the temperature dependence of the RAS of this surface [51].…”

Section: Metal Surfacesmentioning

confidence: 73%

“…We have outlined the insight that can be obtained into the origin the RAS of the Au(110) surface from the application of models in sections 3.2.2-3.2.6. The only first principles study is that of Ziane and co-workers [178,180], who obtain poorer agreement with experiment for the Au(110) surface than they obtain for the other noble metal (110) surfaces and who stress that contributions to the RAS are not limited to high symmetry points or regions of the SBZ with a high density of states. In summary, it seems likely that there is a significant contribution to the RAS of the Au( 110)-(1 × 2) surface from transitions between surfaces states at ∼1.7 eV as proposed in [80,81,84,87] since the RA response has been found [87] to lose intensity in this region upon exposure to air (region A in figure 19).…”

Section: Metal Surfacesmentioning

confidence: 99%

“…Metal surfaces have received much less attention, and relatively few ab initio calculations of RA spectra of metals have been performed. The first papers involving ab initio calculations were published only recently [176][177][178][179][180]. Martin et al [176] investigated the RA response and surface electronic structure of W (110).…”

Section: Metal Surfacesmentioning

confidence: 99%

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Reflection anisotropy spectroscopy

et al. 2005

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Reflection anisotropy spectroscopy (RAS) is a non-destructive optical probe of surfaces that is capable of operation within a wide range of environments. In this review we trace the development of RAS from its origins in the 1980s as a probe of semiconductor surfaces and semiconductor growth through to the present where it is emerging as a powerful addition to the wide range of existing ultra-high vacuum (UHV) surface science techniques. The principles, instrumentation and theoretical considerations of RAS are discussed. The recent progress in the application of RAS to investigate phenomena at metal surfaces is reviewed, and applications in fields including electrochemistry, molecular assembly, liquid crystal device fabrication and remote stress sensing are discussed. We show that the experimental study of relatively simple surfaces combined with continuing progress in the theoretical description of surface optics promises to unlock the full potential of RAS. This provides a firm foundation for the application of the technique to the challenging fields of ambient, high pressure and liquid environments. It is in these environments that RAS has a clear advantage over UHVbased probes for investigating surface phenomena, and its surface sensitivity, ability to monitor macroscopic areas and rapidity of response make it an ideal complement to scanning probe techniques which can also operate in such environments.

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Section: Metal Surfacesmentioning

confidence: 73%

Section: Metal Surfacesmentioning

confidence: 99%

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Reflection anisotropy spectroscopy

et al. 2005

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“…As the atomic step size in the present model is much smaller than the laser wavelengths, the theory for surfaces spatially modulated on the micron scale cannot be applied to the present case. Instead, the atomic-scale origin of anisotropy in electronic structure, as in the case of (110) surfaces of transition metals, , can be considered. Because the above simulations also involve a transition metal (Cu), one can raise the question of whether the Cu 3d orbitals play a crucial role in the laser polarization dependence of the ion dynamics.…”

Section: Resultsmentioning

confidence: 99%

Polarization Dependence of Laser-Induced Dynamics on Non-Flat Metal Surfaces: A Time-Dependent Density Functional Theory Approach

Miyamoto

2023

J. Phys. Chem. A

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Real-time time-dependent density functional theory was used to study the laser-pulse-induced ion dynamics on metal surfaces featuring rows of atomic ridges. In contrast to atomically flat surfaces, the rows of atomic ridges induce anisotropy on the surface even in surface-parallel directions. This anisotropy causes the laser-induced ion dynamics to depend on the orientation of the laser polarization vector in the surface-parallel directions. This polarization dependence occurs for both copper (111) and aluminum (111) surfaces, indicating that the existence of localized d orbitals in the electronic system does not play a crucial role. The difference in kinetic energies between ions on the ridges and those on the planar surface reached a maximum when the laser polarization vector was perpendicular to the rows of ridges but parallel to the surface. A simple mechanism for the polarization dependence and some potential applications in laser processing are discussed.

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