Artículo
Abstract:
We calculate the ballistic conductance G and the diffusive conductivity σ for Co-Ni superlattices grown in the (111) direction, with the intention of investigating the effect of the superlattice band structure on the electric transport properties. The calculation is carried out as a function of the number of atomic layers of each material, in the framework of the semiclassical approximation (Boltzmann's equation) and assuming that each spin component contributes independently. A Hubbard tight-binding Hamiltonian, solved in the unrestricted Hartree-Fock approximation and parametrized to fit bulk equilibrium values, is used to obtain the band structure in each case. We find that the presence of interfaces reduces the in plane and, more strongly, the perpendicular to the plane electric conduction, even when impurity scattering is disregarded. The results for G and σ show qualitative differences and thus, in the interpretation of the experiments, it is important to ascertain the precise nature of the transport regime. We do not find the oscillatory behavior of the conductivity as a function of the number of layers, found in recently reported experimental results. This certainly is not a matter of accuracy of the calculations and therefore rules out the hypothesis that the oscillatory behavior is due to simple band structure effects.
Registro:
| Documento: | Artículo |
| Título: | Transport properties of Co-Ni superlattices |
| Autor: | Weissmann, M.; Llois, A.M.; Ramírez, R.; Kiwi, M. |
| Filiación: | Departamento de Física, Comn. Nac. de Energia Atómica, Avda. del Libertador 8250, 1429 Buenos Aires, Argentina Facultad de Física, Pont. Univ. Católica de Chile, Casilla 306, Santiago 22, Chile Departamento de Fisica, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina |
| Idioma: | Inglés |
| Año: | 1996 |
| Volumen: | 54 |
| Número: | 21 |
| Página de inicio: | 15335 |
| Página de fin: | 15340 |
| Título revista: | Physical Review B - Condensed Matter and Materials Physics |
| Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys. |
| ISSN: | 01631829 |
| CODEN: | PRBMD |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v54_n21_p15335_Weissmann |
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Citas:
---------- APA ----------
Weissmann, M., Llois, A.M., Ramírez, R. & Kiwi, M. (1996) . Transport properties of Co-Ni superlattices. Physical Review B - Condensed Matter and Materials Physics, 54(21), 15335-15340.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v54_n21_p15335_Weissmann [ ]
---------- CHICAGO ----------
Weissmann, M., Llois, A.M., Ramírez, R., Kiwi, M. "Transport properties of Co-Ni superlattices" . Physical Review B - Condensed Matter and Materials Physics 54, no. 21 (1996) : 15335-15340.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v54_n21_p15335_Weissmann [ ]
---------- MLA ----------
Weissmann, M., Llois, A.M., Ramírez, R., Kiwi, M. "Transport properties of Co-Ni superlattices" . Physical Review B - Condensed Matter and Materials Physics, vol. 54, no. 21, 1996, pp. 15335-15340.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v54_n21_p15335_Weissmann [ ]
---------- VANCOUVER ----------
Weissmann, M., Llois, A.M., Ramírez, R., Kiwi, M. Transport properties of Co-Ni superlattices. Phys. Rev. B Condens. Matter Mater. Phys. 1996;54(21):15335-15340.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v54_n21_p15335_Weissmann [ ]
