102 research outputs found
Schottky barrier heights at polar metal/semiconductor interfaces
Using a first-principle pseudopotential approach, we have investigated the
Schottky barrier heights of abrupt Al/Ge, Al/GaAs, Al/AlAs, and Al/ZnSe (100)
junctions, and their dependence on the semiconductor chemical composition and
surface termination. A model based on linear-response theory is developed,
which provides a simple, yet accurate description of the barrier-height
variations with the chemical composition of the semiconductor. The larger
barrier values found for the anion- than for the cation-terminated surfaces are
explained in terms of the screened charge of the polar semiconductor surface
and its image charge at the metal surface. Atomic scale computations show how
the classical image charge concept, valid for charges placed at large distances
from the metal, extends to distances shorter than the decay length of the
metal-induced-gap states.Comment: REVTeX 4, 11 pages, 6 EPS figure
Effect of the dry matter intake level on the sanguine profile of glucose, insulin, urea, estrogen and progesterone and concentration of IGF-I in the follicular liquid of crossbred heifers
Efeito da somatotropina na hipertrofia das fibras musculares esqueléticas e precocidade reprodutiva de novilhas Nelore
Porcine follicular fluid concentration of free insulin-like growth factor-I collected from different diameter ovarian follicles
Desempenho reprodutivo de vacas de corte em lactação e solteiras submetidas à indução/sincronização de estro
A somatotrofina bovina recombinante sobre a ovulação, condição corporal e níveis séricos de colesterol e glicose em ovinos
Return of postpartum ovarian activity in dairy goats supplemented with different levels of energy
Serum progesterone concentration and conception rate of beef cows supplemented with ground corn after a fixed-time artificial insemination protocol
Association of recombinant bovine somatotropin (rBST) with equine chorionic gonadotropin (eCG) on antral follicle count and oocyte production in Holstein and Tabapuã heifers
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