• 
  Nickel, N. H.; Lang, F.; Villora, E. G.; Shimamura, K.; Rappich, J.: Thermal properties of the dominant O – H complex in β-Ga₂O₃. AIP Advances 9 (2019), p. 105026/1-5

10.1063/1.5112168
Open Accesn Version

Abstract:
Using infrared absorption spectroscopy of hydrogen passivated β-Ga2O3 the temperature dependence of the dominant O – H vibrational line was measured between 5 and 300 K. With increasing temperature, the vibrational line shifts by dω = 7.8 cm-1 to lower frequency. This is accompanied by a broadening of the vibrational line from Γ = 0.61 to 8.18 cm-1. The data are discussed in terms of elastic and inelastic phonon scattering and exchange coupling. Moreover, the perturbation of the hydrogen potential is evaluated.