The exponential absorption edge (known as Urbach's rule) observed in most materials is
interpreted in terms of thermal fluctuations in the band-gap energy. The main contribution to …

We report on an experimental study of the temperature dependent band gap shift and the
homogeneous line broadening of the excitonic luminescence in ZnO. This data is derived …

We report the analysis of the Urbach effect in the absorption spectra of the undoped ZnO thin
films. The absorption coefficients of the ZnO thin films show the exponential rise, also known …

We present a Raman scattering study of wurtzite ZnO over a temperature range from 80 to
750 K. Second-order Raman features are interpreted in the light of recent ab initio phonon …

The resonance of the Raman scattering by E 2, A 1 T, E 1 L, and E 1 T phonons, and several
second-order features, has been studied for ZnO for photon energies between 1.6 and 3 eV …

Hall effect measurements on doped, n-type single-crystals of ZnO have yielded: a density-of-
states mass of 0.5m, a shallow donor ionization energy of 0.05 eV, and the temperature …

The LO‐phonon—plasmon coupling in n‐ZnO single crystals is investigated by Raman
spectroscopy at room and liquid nitrogen temperatures. The energy shift and halfwidth …

From Raman scattering on a-plane wurtzite ZnO crystals we obtained a decreasing splitting
between longitudinal and transversal optical phonons with A1 and E1 symmetry as a …

The absorption coefficient for polarized light at photon energies less than that of the lowest
lying direct exciton was measured for single crystals of ZnO at temperatures ranging from …

Low temperature wavelength-modulated reflectivity measurements of isotopically
engineered ZnO samples have yielded the dependence of their A, B, and C excitonic band …