Effects of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>5</mml:mn><mml:mi>d</mml:mi></mml:mrow></mml:math>electrons and spin-orbit interaction on the characteristics of bulk plasmons in lead

Zubizarreta, X.; Silkin, Viatcheslav M.; Chulkov, Eugene V.

doi:10.1103/physrevb.90.165121

Cited by 6 publications

(5 citation statements)

References 70 publications

(102 reference statements)

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“…This is owing to optical transitions from semicore states of atoms (5d states of bismuth and 4d states of tellurium and iodine) to unoccupied states. A similar effect of the influence of semicore electrons was also observed for lead [30]. Photons with the energy corresponding to the energy of σ plasmons and higher than the energy of σ + π plasmons can pass freely through the sample.…”

Section: Role Of Anisotropy and Spin-orbit Interaction In The Opticalsupporting

confidence: 65%

Role of anisotropy and spin-orbit interaction in the optical and dielectric properties of BiTeI and BiTeCl compounds

et al. 2015

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The dielectric and optical properties of semiconductor compounds BiTeI and BiTeCl have been studied the oretically within time dependent density functional theory and experimentally by spectral ellipsometry. Anisotropy of dielectric constants in the long wavelength limit and dispersion of the σ and σ + π bulk plas mons in the longitudinal and transverse directions of the crystals have been discovered. It has been shown that the inclusion of the spin-orbit interaction is necessary for agreement between the theory and the results of optical measurements.

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Section: Role Of Anisotropy and Spin-orbit Interaction In The Opticalsupporting

confidence: 65%

Role of anisotropy and spin-orbit interaction in the optical and dielectric properties of BiTeI and BiTeCl compounds

et al. 2015

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“…A reason for that is a possible impact of the Zr semicore 4s electronic states located at about 27 eV below the Fermi level [47], which were not included in the present calculations. We expect that inclusion of these semicore states would shift down the calculated plasmon energy value like it was found in the case of lead [94]. However, a downward shift of the plasmon peak energy in Zr caused by the interband transitions involving these semicore states should not be as significant as in the case of Pb and to be limited to few tenths of eV.…”

Section: Loss Functionmentioning

confidence: 69%

Collective electronic excitations in Ti and Zr and their dihydrides

et al. 2018

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Electron excitation spectra in Ti and Zr transition metals are calculated in the framework of time-dependent density functional theory. Several peaks found in the obtained loss functions are interpreted as collective excitations. The energy positions of the dominating bulk plasmons are in close agreement with the energy loss experiments. We investigated how the absorption of hydrogen modifies the dielectric properties of these materials. It is shown that the main plasmon energy blueshifts in a such process, again in agreement with experimental observations. On base of the calculated bulk dielectric functions of all these systems, we performed analysis of the excitation spectra at surfaces and nanoparticles. Several plasmon peaks in these systems with rather short lifetimes are found at reduced energies. It is shown how the nanoparticle excitation spectra are modified in the ultraviolet-frequency range upon hydrogen absorption.

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“…[34][35][36][37] From theoretical calculations, the spin-orbit effect is also predicted to have a great influence on the plasmons of Pb, e.g., resulting in anisotropy of the plasmons or generating new excitation modes. [38,39] Previous HREELS experiment [40] of Pb(111) films grown on Si(111) focused on a plasmon mode around 2 eV (q → 0), which was assigned to be a surface plasmon. While there was a huge disagreement with the theoretical calculations, where the mode around 2 eV was proved to be a bulk mode related to the spin-orbit coupling of Pb.…”

Section: Resultsmentioning

confidence: 99%

Collective excitations and quantum size effects on the surfaces of Pb(111) films: An experimental study*

Wang¹,

Lin²,

Xue³

et al. 2021

Chinese Phys. B

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Pb(111) film is a special system that exhibits strong quantum size effects in many electronic properties. The collective excitations, i.e., plasmons, in Pb(111) films are also expected to show signatures of the quantum size effect. Here, using high-resolution electron energy loss spectroscopy, we measured the plasmons on the surface of Pb(111) films with different film thicknesses and analyzed the plasmon dispersions. One surface plasmon branch exhibits prominent damping in the small momentum range, which can be attributed to the interaction between the top and bottom interfaces of the Pb(111) films. With the film thickness increasing, the critical momentum characterizing the damping in Pb(111) films decays not only much slower in Pb(111) films than in other metal films, and even in films with the thickness up to 40 monolayers the damping still exists. The slow decay of the surface plasmon damping, manifesting the strong quantum size effect in Pb(111) films, might be related to the strong nesting of the Fermi surface along the (111) direction.

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Effects of5delectrons and spin-orbit interaction on the characteristics of bulk plasmons in lead

Cited by 6 publications

References 70 publications

Role of anisotropy and spin-orbit interaction in the optical and dielectric properties of BiTeI and BiTeCl compounds

Role of anisotropy and spin-orbit interaction in the optical and dielectric properties of BiTeI and BiTeCl compounds

Collective electronic excitations in Ti and Zr and their dihydrides

Collective excitations and quantum size effects on the surfaces of Pb(111) films: An experimental study*

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