Local density of states for transition-metal interfaces
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Departamento de Fisica del Instituto de Ciencias, Universidad Autonoma de Puebla, Apartado Postal J-48, Puebla 72570, Puebla (Mexico)
- Departamento de Fisica, Universidad de Los Andes, Apartado Aereo 4976, Bogota (Colombia)
We have calculated the interface local density of states (LDOS) for the three transition metals V, Nb, and Ta, using a tight-binding Slater-Koster description and the Green's-function-matching method, together with quickly converging algorithms, to compute the transfer matrices. We obtain the surface LDOS as a byproduct. The calculation turns out to be an almost trivial computational problem. The method proves to be a very useful tool to analyze experimental results and to check models as a function of the value of the tight-binding parameters either of the bulk or at the interface itself or as a function of different geometrical situations. It is also a solid basis on which other problems depending on a proper description of the local density of states can be worked out. We analyze in detail the Nb/Ta, Nb/V, and Ta/V interfaces in the (100) direction. We find that some of the properties found in surfaces could also be found at interfaces. In particular, we find that the V side of some interfaces could show magnetism on the atomic layer in contact with the foreign medium as the (100) surface does for this metal.
- OSTI ID:
- 6182114
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:11; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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