@article{7b0bee378af64c23b57d646c3b6523a6,
title = "Longitudinal phonon plasmon mode coupling in β -Ga2O3",
abstract = "In this letter, we investigate a set of n-type single crystals of monoclinic symmetry β-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.",
author = "Mathias Schubert and Alyssa Mock and Rafa{\l} Korlacki and Sean Knight and Zbigniew Galazka and G{\"u}nther Wagner and Virginia Wheeler and Marko Tadjer and Ken Goto and Vanya Darakchieva",
note = "Funding Information: This work was supported in part by the National Science Foundation under Award No. DMR 1808715, the Air Force Office of Scientific Research under Award No. FA9550-18-1-0360, the Nebraska Materials Research Science and Engineering Center under Award No. DMR 1420645, the Swedish Energy Agency under Award No. P45396-1, the Swedish Research Council VR Award No. 2016-00889, the Swedish Foundation for Strategic Research Grant Nos. FL12-0181, RIF14-055, and EM16-0024, and the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University, Faculty Grant SFO Mat LiU No. 2009-00971. M.S. acknowledges the University of Nebraska Foundation and the J. A. Woollam Foundation for financial support. We acknowledge Klaus Irmscher for critical reading of this manuscript. Publisher Copyright: {\textcopyright} 2019 Author(s).",
year = "2019",
month = mar,
day = "11",
doi = "10.1063/1.5089145",
language = "English (US)",
volume = "114",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "10",
}