Electronic theory of surface segregation in the coherent potential approximation: The surface segregation in CoNi, IrPt and RhPt
β Scribed by M. Brejnak; P. Modrak
- Publisher
- Elsevier Science
- Year
- 1993
- Weight
- 391 KB
- Volume
- 280
- Category
- Article
- ISSN
- 0167-2584
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Experimental results are presented that support an earlier hypothesis that the bulk diffusion near surfaces is orientation dependent. From a literature study, the calculated surface energy of the (110) surface is higher than that of the (111) surface in fcc crystals, which could lead to different va
Equilibrtum surface segregation concentrations have been measured for tm diluted in aluminmm wrth bulk concentrattons of about 2 x 10-s atom per aluminium atom, between 623 and 893 K. MacLean's model fits the experimental results well and gives a segregatton energy q,, = -77 kJ mole-' between 293 K
We have theoretically studied the electronic and optical properties of a quantum well (QW) in which the well region is constructed from a binary alloy semiconductor A 1--x B x in the coherent potential approximation (CPA). A tight binding model is used for a single particle (electron, hole, Frenkel