Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Entire DC Network
Model For Fe2+ Intracenter-Induced Photoconductivity In Inp: Fe, David C. Look
Model For Fe2+ Intracenter-Induced Photoconductivity In Inp: Fe, David C. Look
Physics Faculty Publications
We have observed a broad, room-temperature photoconductivity band, with a peak at 0.44 eV, in Fe-doped InP. This band is attributed to an Fe2+ intracenter optical excitation, followed by a thermal excitation to the conduction band. We derive a photoconductivity expression which takes into account optical and thermal transitions between impurity ground and excited states, within the band gap, and the conduction band. The parameters yielded by the model include a thermal excitation prefactor of 1×1011 sec-1, an electron capture cross section of 1×10-15 cm2, a spontaneous recombination coefficient of 1×106 sec …
Type Conversion In Electron‐Irradiated Gaas, J. W. Farmer, David C. Look
Type Conversion In Electron‐Irradiated Gaas, J. W. Farmer, David C. Look
Physics Faculty Publications
The unambiguous type conversion of GaAs by electron irradiation is reported here for the first time. Several high‐quality n‐type vapor‐phase epitaxial layers (ρ?3 Ω cm and μ?7000 cm2/V sec at 300 K) were converted by 1‐MeV electrons to high‐quality p‐type layers (ρ?30 Ω cm and μ?400 cm2/V sec). Temperature‐dependent Hall‐effect data show energy levels at 0.5, 0.3, and about 0.1 eV above the valence band. Evidence is presented to indicate that the failure of some of our samples (and, perhaps, other samples reported in the literature) to convert to low‐r …
Electronic Structure Calculation Of Icosahedral B-12, R. P. Wagner, Gust Bambakidis
Electronic Structure Calculation Of Icosahedral B-12, R. P. Wagner, Gust Bambakidis
Physics Faculty Publications
No abstract provided.
Electrical Resistivity Studies Of Order-Disorder Phenomena In V2h And V2d, Gust Bambakidis, M. W. Pershing, R. C. Bowman
Electrical Resistivity Studies Of Order-Disorder Phenomena In V2h And V2d, Gust Bambakidis, M. W. Pershing, R. C. Bowman
Physics Faculty Publications
No abstract provided.
Ionization, Luminosity, And Heating Of The Upper Atmosphere Of Mars, Jane L. Fox, Alexander Dalgarno
Ionization, Luminosity, And Heating Of The Upper Atmosphere Of Mars, Jane L. Fox, Alexander Dalgarno
Physics Faculty Publications
A model based upon Viking data is constructed of the Martian atmosphere, and a comprehensive quantitative discussion is given of the measurements of the ultraviolet dayglow. A detailed assessment is made of the heating of the neutral and ionized components of the atmosphere arising from the absorption of ultraviolet solar radiation.