Interplay between plasmons and the band structure for the Mo(112) surface

Abstract

"Interplay between plasmons and the band structure for the Mo(112) surface" (2001). Peter Dowben Publications. 25. http://digitalcommons.unl.edu/physicsdowben/25 Interplay between plasmons and the band structure for the Mo"112… surface Recent photoemission and inverse photoemission results for the Mo͑112͒ surface are discussed in the framework of the calculated band structure. For the Mo͑112͒ surface, the main photoemission features combine contributions from both the surface and the bulk. Except for those photon energies near to excitations of the bulk and multipole surface plasmons, the comparison of the bulk band structure, along the k points normal to the surface, shows a good agreement with photoemission spectra in the position of the critical points. The dominant surface states at ⌫ are found to have the a 1 symmetry, while the band along ⌫ -Ȳ at about 0.8 eV binding energy is found to be odd with respect to the ⌫ -X mirror plane. The surface-induced enhancement of photoemission-the surface photoeffect-is indicated and is shown to be responsible for dramatic changes in the spectra when the photon energy falls into the region of the multipole surface plasmons.

Electronic structure of ErAs(100)

“…33,34 The parallel component of the wave vector (k ʈ ) is determined from the photoelectron ͑or incident electron͒ kinetic energy and the emission ͑or incidence͒ angle as…”

Morphological and electronic properties of ultrathin crystalline silica epilayers on a Mo(112) substrate

“…The UP spectrum of the clean Mo͑112͒ surface ͑0͒ is shown for comparison and is in line with the results of a recent angle-resolved photoelectron spectroscopy ͑ARPES͒ and inverse photoelectron spectroscopy ͑IPES͒ study in which the origin of the different peaks in the spectrum is discussed in detail. 50,51 The freshly deposited silica film changes the UP spectrum of the Mo͑112͒ surface substantially. On the basis of He I UP studies of 4:2 coordinated silica modifications reported in the FIG.…”

The electronic band structure of CoS2

“…The Γ critical point of 2.31 Å −1 (in the second Brillouin zone) indi- cates the small value of the inner potential, much smaller than in most transition metals (including Ni [34]and Mo [35]). The low value is not completely unreasonable, because in general there is no reason to expect the inner potential to be determined by the full bandwidth in a chemical compound.…”

“…In this regard, CoS 2 resembles the much touted La 0.65 Sr 0. 35 MnO 3 [18], although CoS 2 is less complicated. CoS 2 can be alloyed with the narrow band gap semiconductor FeS 2 to become the highly spin-polarized ferromagnet Fe 1−x Co x S 2 , which more closely resembles an ideal ground-state half-metallic ferromagnet, by "tuning" the Fermi level [12][13][14]19].…”