Optical spectroscopy and electronic structure of the face-centered icosahedral quasicrystals Zn-Mg-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>R</mml:mi></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant="normal">Y</mml:mi></mml:mrow></mml:math>, Ho, Er)

Karpus, V.; Tumėnas, Saulius; Suchodolskis, A.; Arwin, Hans; Aßmus, W.

doi:10.1103/physrevb.88.094201

Cited by 2 publications

(2 citation statements)

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“…In the framework of the two‐band model, the general

σ_{ij} false(ω false)

formula reduces to the form (see Refs. for details)

\begin{matrix} right σ_{italicij} (ω) & center = & left \sum_{boldg \in G} \frac{g_{i} g_{j}}{g^{2}} \frac{e^{2} g}{8 π ℏ} \int_{1}^{\infty} d x \frac{S (x) K (x, z, b)}{x^{3} \sqrt{x^{2} - 1}}, \end{matrix}

\begin{matrix} right K (x, z, b) & center = & left \frac{z}{i π} ([], \frac{1}{x - false(z + i b false)} + \frac{1}{x + false(z + i b false)}) . \end{matrix}

Here, the dimensionless integration variable x corresponds to the energy difference between bands measured in the energy gap

Δ_{boldg}

units,

x = false[ϵ_{2} false(k false) - ϵ_{1} false(k false) false] / Δ_{boldg}

, the z and b parameters correspond to the dimensionless photon energy,

z = ℏ ω / Δ_{boldg}

, and the broadening parameter,

b = Γ / Δ_{boldg}

. The

S false(x false)

function presents an integral of the Fermi occupation factors over the

boldk

‐vector component perpendicular to

boldg

‐vector,

…”

Section: Discussionmentioning

confidence: 99%

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Interband optical transitions of Zn

Karpus

Tumėnas

Eikevičius

et al. 2016

Physica Status Solidi (b)

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Experimental results of an optical study of single-crystal zinc are presented. Components of the Zn dielectric function tensor were measured by spectroscopic ellipsometry in the 0.1-5 eV spectral range. In the NIR-VIS range, the dielectric function spectra show two clearly resolved, polarization-dependent optical features located at about 1 and 1.7 eV. The optical features were analyzed in a framework of parallel-band optical transitions. The performed theoretical calculations of the optical conductivity spectra well reproduce the experimental data with respect to positions, intensities, and polarization dependencies of the observed interband absorption peaks.

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“…In the framework of the two‐band model, the general