Large mismatch heteroepitaxy of InSb on Si(1 1 1) substrates using CaF2 buffer layers

Liu, W.K.; Fang, X. M.; Winesett, J.; Ma, Weiluan; Zhang, Xuemei; Santos, M. B.; McCann, Patrick J.

doi:10.1016/s0022-0248(96)00912-8

Cited by 4 publications

(4 citation statements)

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“…However, due to the increase of the anion vacancy concentration on approaching the surface, the sum of both charge carriers increases considerably above that in the bulk. This should cause, in addition, an increased ionic conductivity in the near-surface region of the crystal as well as in thin fluorite crystal layers [13]. The latter case will be treated in the next section in greater detail.…”

Section: Semi-infinite Crystalmentioning

confidence: 97%

“…19) in appendix A, using (A.12) and (A. 13), the course of the potential (x) in the space-charge layer, and with this the dependence of the vacancy and interstitial concentrations on the distance from the surface, x, as well as the respective surface concentrations, can be calculated:…”

Section: Semi-infinite Crystalmentioning

confidence: 99%

“…CaF 2 is, as the most prominent representative of crystals with the fluorite structure, not only of basic scientific interest, but also a material of great technological importance. This concerns, for example, bulk growth of large CaF 2 crystals for nano-lithography, see, e.g., [12], as well as the formation of thin epitaxial layers on semiconductors: above all, because of the low misfit on silicon [13,14]. Within our studies we have recently also carried out theoretical determinations of the adsorption energies of the CaF 2 molecule at different sites on the (111) surface of the CaF 2 crystal [15] as well as of diffusion pathways on the terrace [16].…”

Section: Introductionmentioning

confidence: 99%

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Theory of the Frenkel–Debye boundary layer at the (111) surface of pure CaF₂

Dabringhaus

Бутман

2003

J. Phys.: Condens. Matter

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The present paper is concerned with a theoretical study of the properties of the Frenkel-Debye boundary layer at the (111) surface of pure (undoped) CaF 2 , a crystal with anti-Frenkel defects, i.e. with anion vacancies and interstitials. The study is based on theoretical determinations of the adsorption energies of the fluorine ion at the terrace, step and kink sites on the surface, which are, together with the assumption of experimental step distances and theoretical kink concentrations, necessary pre-requisites for a quantitative description of the surface charge compensating that of the space-charge region. The results show that, for realistic surface conditions, the surface and space charges, and with them the potential between surface and bulk, are reduced considerably compared with those for an unlimited number of accessible surface sites. Nevertheless, on approaching the surface a strong increase in the anion vacancy concentration against that of the bulk still exists, which should lead to an increased ion conductivity in near-surface regions and thin fluorite layers.

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Section: Semi-infinite Crystalmentioning

confidence: 97%

Section: Semi-infinite Crystalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theory of the Frenkel–Debye boundary layer at the (111) surface of pure CaF₂

Dabringhaus

Бутман

2003

J. Phys.: Condens. Matter

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“…Presently, calcium fluoride has attracted much attention because it is a possible candidate for epitaxial overgrowth of silicon and hence for the formation of three-dimensional integrated devices [19,20]. CaF 2 is further an efficient host material for the incorporation of rare-earth ions, allowing laser action [21].…”

Section: Introductionmentioning

confidence: 99%