Combined EELS, LEED and SR-XPS study of ultra-thin crystalline layers of indium nitride on InP(1 0 0)—Effect of annealing at 450 °C

Robert-Goumet, Christine; Petit, Matthieu; Bideux, L.; Gruzza, B.; Monier, Guillaume; Matolín, Vladimı́r; Škála, Tomáš; Tsud, Nataliya

doi:10.1016/j.apsusc.2006.09.067

Cited by 4 publications

(2 citation statements)

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“…For each case, the position of the surface plasmon peak is quite well reproduced ( ℏω s ( In ) = 8.0 eV as expected from other researches), and the experimental widths and intensities of the two peaks are reasonably well reproduced by the model assuming that ℏγ is energy‐dependent. Moreover, as shown in Figs and , the value of ℏγ , which allows the best agreement between theory and experiment, is independent on the angular configuration.…”

Section: Resultsmentioning

confidence: 97%

“…Secondly, the energy of this oscillator, ℏω 0 , is adjusted to match the position of the bulk plasmon peak with experiment and must be independent of the primary electron energy. We obtain ℏω 0 ( In ) = 11.3 eV that agrees with previous experimental results from REELS or from optical measurement . Thirdly, because of the optical sum rule, the condition A = ( ℏω ) 2 is required, and fourthly, In being a metal, we have α = 1 and E G = 0 eV.…”

Section: Resultsmentioning

confidence: 99%

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Energy dependence of the energy loss function parametrization of indium in the Drude–Lindhard model

Pauly

Dubus

Monier

et al. 2014

Surface & Interface Analysis

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The energy loss function (ELF) is a key parameter for the calculations of energy losses undergone by electrons in matter. It is often the only input in the calculations performed within the models based on the semi-classical dielectric response theory. Its perfect knowledge is thus of primordial importance. To evaluate the ELF, it is usual to consider as a model an expansion in Drude-Lindhard (DL) type oscillators with fixed values of the strength, width, energy and dispersion for the various oscillators. However, for materials that are characterized by a single sharp oscillator as aluminium or indium, it has been shown [Phys. Rev. B 46 (1992) 2486] that the damping parameter that corresponds in the DL model to the width of the oscillator increases for decreasing incident electron energy. To emphasize this effect, we perform in this work systematic calculation of the ELF for an indium target and for incident electron energies between 200 and 2000 eV. The ELF is determined by comparing REELS (reflection electron energy loss spectroscopy) experimental inelastic electron scattering cross sections with cross sections calculated within the semi-classical dielectric response model, which is implemented in the QUEELS-ε(k,ω)-REELS software (Quantitative analysis of Electron Energy Losses at Surfaces) [Surf. Interface Anal. 36 (2004) 824]. We also perform measurements and calculations for varying incident and exit angles of the electron, namely for angles to the surface normal between 15 o and 75 o , to check the validity of our results for all geometries. Our results show that the damping parameter of indium in the DL model for electron energy of 200 eV is three times larger than for energy of 2000 eV.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%