Effective uniaxial dielectric function tensor and optical phonons in ($\bar{2}01$)-plane oriented ${\hat{I}}^2$-Ga${}_2$O${}_3$ films with equally-distributed six-fold rotation domains

Alyssa Mock, Steffen Richter, Alexis Papamichail +11

Monoclinic ${\hat{I}}^2$-Ga${}_2$O${}_3$ films grown on $c$-plane sapphire have been shown to exhibit six $(\bar{2}01)$-plane oriented domains, which are equally-spaced-by-rotation around the s…