TO(Γ) mode resonances in the rare-earth nitrides
Far infrared measurements of the absorption into the IR-active TO(Γ) mode are reported for a selection of the rare-earth mononitrides. The frequencies harden as anticipated by ≈15% as the lattice constant shrinks by ≈6% from SmN to LuN, though they are typically ∼25% softer than the LSDA+U predictio...
Main Authors: | , , , , , , |
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Format: | Article |
Language: | English |
Published: |
AIP Publishing LLC
2022-07-01
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Series: | AIP Advances |
Online Access: | http://dx.doi.org/10.1063/5.0098290 |
Summary: | Far infrared measurements of the absorption into the IR-active TO(Γ) mode are reported for a selection of the rare-earth mononitrides. The frequencies harden as anticipated by ≈15% as the lattice constant shrinks by ≈6% from SmN to LuN, though they are typically ∼25% softer than the LSDA+U prediction published a decade ago. The data are in much closer agreement with our computation based on more recent software for two in the series: GdN and LuN. The resonances show surprisingly heavy damping, diminishing from the lighter to heavier rare earth elements. |
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ISSN: | 2158-3226 |