منابع مشابه
Ambipolar Tunneling in Near-surface Quantum Wells
We study the photoluminescence from a near-surface quantum well in the regime of ambipolar tunneling to the surface states. Under steady-state excitation an electric field develops self-consistently due to the condition of equal tunneling currents for electrons and holes. The field induces a Stark shift of the photolumi-nescence signal which compares well with experimental data from near-surfac...
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The growth and surface passivation of near-surface InGaAs quantum wells (QWs) on GaAs (1 1 0) substrate have been investigated. Triangular shaped small islands, approximate areal density of 10 cm , are observed on metal organic vapor phase epitaxially grown GaAs single layer and InGaAs multi-quantum wells (MQWs) surfaces in a wide range of growth temperatures. By optimizing the growth condition...
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The world's domestic cats carry patterns of sequence variation in their genome that reflect a history of domestication and breed development. A genetic assessment of 979 domestic cats and their wild progenitors-Felis silvestris silvestris (European wildcat), F. s. lybica (Near Eastern wildcat), F. s. ornata (central Asian wildcat), F. s. cafra (southern African wildcat), and F. s. bieti (Chines...
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It is shown that the ratio of the e + over e − flux below the geomagnetic cutoff reported recently by the AMS experiment is due to the geomagnetic East-West effect. New measurements of particle fluxes close to earth have been performed recently by the AMS experiment, providing a body of highly accurate new data on particle populations in the close terrestrial environment, which open new prospec...
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Asteroids and comets on orbits with perihelion distance q < 1.3 AU and aphelion distance Q > 0.983 AU are usually called near-Earth objects (NEOs). It has long been debated whether the NEOs are mostly of asteroidal or cometary origin. With improved knowledge of resonant dynamics, it is now clear that the asteroid belt is capable of supplying most of the observed NEOs. Particular zones in the ma...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1958
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800063135