indirect gap

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• Indirect bandgap — In semiconductor physics, an indirect bandgap is a bandgap in which the minimum energy in the conduction band is shifted by a k vector relative to the valence band. The k vector difference represents a difference in momentum.Semiconductors that… …   Wikipedia

• Direct and indirect band gaps — In semiconductor physics, the band gap of a semiconductor is always one of two types, a direct band gap or an indirect band gap. The band gap is called direct if the momentum of electrons and holes is the same in both the conduction band and the… …   Wikipedia

• Band gap — This article is about solid state physics. For voltage control circuitry in electronics, see Bandgap voltage reference. In solid state physics, a band gap, also called an energy gap or bandgap, is an energy range in a solid where no electron… …   Wikipedia

• Explanatory gap — The basic idea of the explanatory gap is that human experience (such as qualia) cannot be fully explained by mechanical processes; that something extra, perhaps even of a different metaphysical type, must be added to fill the gap . The… …   Wikipedia

• Mid-Atlantic gap — The Mid Atlantic Gap was the gap in coverage by land based Coastal Command antisubmarine (A/S) aircraft during the Battle of the Atlantic in the Second World War. It is frequently known as The Black Pit, as well as the Atlantic Gap, Air Gap,… …   Wikipedia

• Metal-induced gap states — In bulk semiconductor band structure calculations, it is assumed that the crystal lattice (which features a periodic potential due to the atomic structure) of the material is infinite. When the finite size of a crystal is taken into account, the… …   Wikipedia

• urinary anion gap — the amount of urinary anion not routinely measured by laboratory screening, which accounts for the difference between the routinely measured anion and cation, equal to sodium + potassium − chloride. It is an indirect measure of ammonium… …   Medical dictionary

• Semiconductor — Citations missing|date=March 2008A semiconductor is a solid material that has electrical conductivity in between a conductor and an insulator; it can vary over that wide range either permanently or dynamically. [. They are used in many… …   Wikipedia

• Electronic band structure — In solid state physics, the electronic band structure (or simply band structure) of a solid describes ranges of energy that an electron is forbidden or allowed to have. It is due to the diffraction of the quantum mechanical electron waves in the… …   Wikipedia

• Semimetal — A semimetal is a material with a small overlap in the energy of the conduction band and valence bands. [cite book first=Gerald last=Burns title=Solid State Physics year=1985 publisher=Academic Press, Inc. San Diego id=ISBN 0 12 146070 3 pages=339 …   Wikipedia

• Intrinsic semiconductor — An intrinsic semiconductor, also called an undoped semiconductor or i type semiconductor, is a pure semiconductor without any significant dopant species present. The number of charge carriers is therefore determined by the properties of the… …   Wikipedia