Now showing items 11-20 of 132
REVIEW ARTICLE: The relationship of the D-X centre in AlxGa1-xAs and other III-V alloys with the conduction band structure
(IOP Publishing Ltd, 1988-12-01)
The electrical properties of the AlxGa1-xAs alloys for x>or=0.24 are dominated by deep donors which appear in undoped and doped crystals. The corresponding defects, which are now more commonly known as D-X centres, also ...
Effect of the lifting of Kramer’s degeneracy on excitonic linewidths in quantum well optical modulators
(The American Institute of Physics, 1988-08-29)
In symmetric quantum well structures, the hole subband states maintain the spin degeneracy (Kramer’s degeneracy), but in asymmetric quantum wells and in optical modulators in the presence of electric field, the degeneracy ...
A closed‐form, free‐energy functional for a binary polymer mixture
(The American Institute of Physics, 1988-06-15)
A new, closed‐form, free‐energy functional is derived for a binary polymer mixture. When the free‐energy functional is expanded in series form around the mean concentration, the leading term in the expansion is the usual ...
Deformation of a free surface as a result of vortical flows
(The American Institute of Physics, 1988-05)
The deformation of a free surface caused by the roll up of a vortex sheet below the surface is studied. The large amplitude motion depends on both the strength and depth of the vortex sheet. A distinction is made between ...
The thermodynamics of the divalent metal fluorides. II. Heat capacity of the fast ion conductor BaSnF 4 from 7 to 345 K
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1988-11)
The heat capacity of the fast ion conductor BaSnF 4 was measured over the temperature range 7< T <345 K using adiabatic calorimetry. Our results show that a phase transition is not present. However, an anomalous rise in ...
Adiabatic phases from an effective action
(Elsevier, 1988-04-28)
Berry's phase is calculated as a term in the derivative expansion of the effective action of a system in an external field.
An infrared study of thiocyanate at the mercury electrode interface
(Elsevier, 1988-07)
FTIR surface infrared spectroscopy of the mercury solution interface shows the adsorption of complex ions of mercury thiocyanate at potentials more positive than -200mV vs SCE, and indicates that thiocyanate ion is adsorbed ...
Natural convection in evaporating sessile drops with solidification
(Elsevier, 1988-02)
Transient natural convection and internal solidification in a minute drop evaporating on a horizontal plate is investigated by the laser shadowgraph-schlieren method and direct microscopic photography. The drop is point-cooled ...
On the lattice approach to the maximum Higgs boson mass
(Elsevier, 1988-09-08)
If the triviality upper bound on the Higgs boson mass mH occurs for strong self-coupling, inferring properties of the Higgs from the euclidean propagator is in principle theoretically difficult whether in coordinate or ...
On the completeness of the analysis of third and fourth spectra of the iron group, and the spectra of early B stars
(Elsevier, 1988-04-02)
The spectroscopic analysis of normal, early B stars requires a sound atomic data base, especially for the third and fourth spectra of the iron-group elements. We review the present status of the term analyses of third and ...