3 citations · 9 across the 7 of their papers we have counts for
7 papers
Off-center impurity in alkali halides: reorientation, electric polarization and pairing to F center. IV. Reorientational rate
G. Baldacchini, R. M. Montereali, U. M. Grassano +5
This last Part IV is aimed at deriving relaxation rates (times) of an off-center Li+ impurity. We follow Christov's reaction rate method to define general rate equations in terms o…
Off-center impurity in alkali halides: reorientation, electric polarization and pairing to F center. III. Numerical calculations
G. Baldacchini, R. M. Montereali, U. M. Grassano +5
We carried out numerical calculations by an extended-Hueckel program in order to check the analytical results reported in the preceding Part I and Part II. We typically consider al…
Off-center impurity in alkali halides: reorientation, electric polarization and pairing to F center. II. In-plane rotation and polarizability
G. Baldacchini, R. M. Montereali, U. M. Grassano +5
Because of its inherent 2-D character, the eigenvalue equation for the hindered rotation around a normal cation site of an off-center impurity nearest-neighboring an F center is th…
Off-center impurity in alkali halides: reorientation, electric polarization and pairing to F center. I. Basic equations
G. Baldacchini, R. M. Monterealli, U. M. Grassano +5
Extending earlier work on a vibronic theory of the FA centers in alkali halides, the reorientation is now considered of an off-center Li+ impurity, either isolated or near an F cen…
Variational band theory of vibronic polarons in crystals. III. Numerical calculations
M. Georgiev, A. G. Andreev, M. D. Ivanovich
In the preceding Part II, we derived variational equations for the phonon Fourier amplitudes and for the Fourier amplitudes of the fractional contribution of the electronic bands t…
Itinerant vibronic polarons: A Merrifield approach I. Low energy range calculations
S. G. Tsintsarska, M. D. Ivanovich, A. Andreev +3
We extend Merrifield's Variational Ansatz in the variational band theory of polarons to cover a frame of two electronic bands mixed by an Einstein phonon. The Hamiltonian is compos…