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Brillouin zone cent...
Brillouin zone center phonon modes in ZnGa2O4
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- Stokey, Megan (författare)
- Univ Nebraska, NE 68588 USA
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- Korlacki, Rafal (författare)
- Univ Nebraska, NE 68588 USA
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- Knight, Sean (författare)
- Univ Nebraska, NE 68588 USA
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- Hilfiker, Matthew (författare)
- Univ Nebraska, NE 68588 USA
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- Galazka, Zbigniew (författare)
- Leibniz Inst Kristallzuchtung, Germany
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- Irmscher, Klaus (författare)
- Leibniz Inst Kristallzuchtung, Germany
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- Darakchieva, Vanya (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Schubert, Mathias (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,Univ Nebraska, NE 68588 USA; Leibniz Inst Polymerforsch eV, Germany
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(creator_code:org_t)
- AMER INST PHYSICS, 2020
- 2020
- Engelska.
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Ingår i: Applied Physics Letters. - : AMER INST PHYSICS. - 0003-6951 .- 1077-3118. ; 117:5
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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http://liu.diva-port...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Infrared-active lattice mode properties of melt-grown high-quality single bulk crystals of ZnGa2O4 are investigated by combined spectroscopic ellipsometry and density functional theory computation analysis. The normal spinel structure crystals are measured by spectroscopic ellipsometry at room temperature in the range of 100cm(-1)-1200cm(-1). The complex-valued dielectric function is determined from a wavenumber-by-wavenumber approach, which is then analyzed by the four-parameter semi-quantum model dielectric function approach augmented by impurity mode contributions. We determine four infrared-active transverse and longitudinal optical mode pairs, five localized impurity mode pairs, and the high frequency dielectric constant. All four infrared-active transverse and longitudinal optical mode pairs are in excellent agreement with results from our density functional theory computations. With the Lyddane-Sachs-Teller relationship, we determine the static dielectric constant, which agrees well with electrical capacitance measurements performed on similarly grown samples. We also provide calculated parameters for all Raman-active and for all silent modes and, thereby, provide a complete set of all symmetry predicted Brillouin zone center modes.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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