منابع مشابه
Half-metallic Zinc-Blende Compounds
We report first-principles calculations of zinc-blende half-metals, identifying systems for epitaxial growth with semiconductors, and present calculations for CrAs/GaAs multilayers. We find that half-metallicity is conserved troughout the heterostructure, making this a good candidate for spintronics applications.
متن کاملAqueous synthesis of zinc blende CdTe/CdS magic-core/thick-shell tetrahedral-shaped nanocrystals with emission tunable to near-infrared.
We demonstrate the synthesis of near-IR-emitting zinc blende CdTe/CdS tetrahedral-shaped nanocrystals with a magic-sized (approximately 0.8 nm radius) CdTe core and a thick CdS shell (up to 5 nm). These high-quality water-soluble nanocrystals were obtained by a simple but reliable aqueous method at low temperature. During the growth of the shell over the magic core, the core/shell nanocrystals ...
متن کاملSurface vacancies in II-VI and 111-V zinc blende semiconductors•>
We present calculations of the bound state energy levels of ideal vacancies near the ( 110) surface of some zinc blende II-VI and Ill-Y semiconductors: CdTe, ZnTe, GaAs, AlAs, InAs, and some alloys among them. Here we compare vacancies near the surface ofii-VI's with those ofiii-V's. In contrast to the III-V's, where a neutral vacancy has an odd number of electrons, a neutral vacancy in a II-VI...
متن کاملPseudo-Hydrogen Passivation: A Novel Way to Calculate Absolute Surface Energy of Zinc Blende (111)/(͞1 ͞1 ͞1) Surface.
Determining accurate absolute surface energies for polar surfaces of semiconductors has been a great challenge in decades. Here, we propose pseudo-hydrogen passivation to calculate them, using density functional theory approaches. By calculating the energy contribution from pseudo-hydrogen using either a pseudo molecule method or a tetrahedral cluster method, we obtained (111)/(111) surfaces en...
متن کاملClean and As-Covered Zinc-Blende GaN (001) Surfaces: Novel Surface Structures and Surfactant Behavior
We have investigated clean and As-covered zinc-blende GaN (001) surfaces, employing firstprinciples total-energy calculations. For clean GaN surfaces our results reveal a novel surface structure very different from the well-established dimer structures commonly observed on polar III-V (001) surfaces: The energetically most stable surface is achieved by a Peierls distortion of the truncated s1 3...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 1993
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.108623