Isotopic study of Raman active phonon modes in β-Ga2O3

Anharmonicity on Raman active phonon modes of LaAlO3

Raman tensor elements of β-Ga2O3

The Raman spectrum and particularly the Raman scattering intensities of monoclinic β-Ga2O3 are investigated by experiment and theory. The low symmetry of β-Ga2O3 results in a complex dependence of the Raman intensity for the individual phonon modes on the scattering geometry which is additionally affected by birefringence. We measured the Raman spectra in dependence on the polarization directio...

Raman study of phonon modes in bismuth pyrochlores

D. J. Arenas,1,2 L. V. Gasparov,1 Wei Qiu,3 J. C. Nino,3 Charles H. Patterson,4 and D. B. Tanner2 1Department of Physics, University of North Florida, Jacksonville, Florida 32224, USA 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA 3Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, USA 4School of Physics, Trinity C...

Study of phonon modes in germanium nanowires

The observation of pure phonon confinement effect in germanium nanowires is limited due to the illumination sensitivity of Raman spectra. In this paper we measured Raman spectra for different size germanium nanowires with different excitation laser powers and wavelengths. By eliminating the local heating effect, the phonon confinement effect for small size nanowires was clearly identified. We h...

Ab initio calculation of electron–phonon coupling in monoclinic β-Ga2O3 crystal