Longitudinal phonon plasmon mode coupling in β-Ga2O3

Schubert, Mathias, 1966- (author): Linköpings universitet,Halvledarmaterial,Tekniska fakulteten,University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA; Leibniz Institute for Polymer Research, Dresden 01069, Germany;

Mock, Alyssa (author): Linköpings universitet,Halvledarmaterial,Tekniska fakulteten

Darakchieva, Vanya, 1971- (author): Linköpings universitet,Halvledarmaterial,Tekniska fakulteten

(creator_code:org_t)

American Institute of Physics (AIP), 2019
2019
English.
In: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 114:10

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

In this letter, we investigate a set of n-type single crystals of monoclinic symmetry beta-Ga2O3 with different free electron concentration values by generalized far infrared and infrared spectroscopic ellipsometry. In excellent agreement with our previous model prediction, we find here by experiment that longitudinal-phonon-plasmon coupled modes are polarized either within the monoclinic plane or perpendicular to the monoclinic plane. As predicted, all modes change the amplitude and frequency with the free electron concentration. The most important observation is that all longitudinal-phonon-plasmon coupled modes polarized within the monoclinic plane continuously change their direction as a function of free electron concentration.

By the author/editor: Schubert, Mathia ...; Mock, Alyssa; Korlacki, Rafal; Knight, Sean; Galazka, Zbignie ...; Wagner, Guenther; show more...; Wheeler, Virgini ...; Tadjer, Marko; Goto, Ken; Darakchieva, Van ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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