Semiclassical electronic transport calculations in multilayered granular alloys
We have calculated the electrical conductivity in the current-in-plane geometry of multilayered granular alloys composed of Co clusters embedded in Ag alternating with pure Ag layers. In particular, we have paid attention to the conductivity behavior as a function of Ag layer thickness, Co clusters&...
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I28-R145-paper_00218979_v102_n1_p_Milano_oai2020-10-19 Milano, J. Llois, A.M. 2007 We have calculated the electrical conductivity in the current-in-plane geometry of multilayered granular alloys composed of Co clusters embedded in Ag alternating with pure Ag layers. In particular, we have paid attention to the conductivity behavior as a function of Ag layer thickness, Co clusters' size, and degree of percolation. The electronic structure is self-consistently calculated within the unrestricted Hartree-Fock approximation using a parametrized tight binding Hamiltonian which includes a Hubbard-like term. The conductivity tensor is obtained by using the semiclassical Boltzmann equation in the anisotropic relaxation time approximation. We have used a s-d Mott-like scattering model for the electronic mean free path taking into account the Sondheimer's picture for electronic transport in thin films. We find that the experimental conductivity behavior at coalescence can be explained through the electronic band contribution. The conductivity behavior of continuous multilayers is already attained in the very early stage of percolation, as in the experiments. © 2007 American Institute of Physics. Fil:Milano, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Llois, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00218979_v102_n1_p_Milano info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J Appl Phys 2007;102(1) Approximation theory Cobalt Electron transport properties Electronic structure Granular materials Relaxation time Silver Tensors Thickness measurement Anisotropic relaxation time Granular alloys Hartree-Fock approximation Multilayers Semiclassical electronic transport calculations in multilayered granular alloys info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v102_n1_p_Milano_oai |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-145 |
| collection |
Repositorio Digital de la Universidad de Buenos Aires (UBA) |
| topic |
Approximation theory Cobalt Electron transport properties Electronic structure Granular materials Relaxation time Silver Tensors Thickness measurement Anisotropic relaxation time Granular alloys Hartree-Fock approximation Multilayers |
| spellingShingle |
Approximation theory Cobalt Electron transport properties Electronic structure Granular materials Relaxation time Silver Tensors Thickness measurement Anisotropic relaxation time Granular alloys Hartree-Fock approximation Multilayers Milano, J. Llois, A.M. Semiclassical electronic transport calculations in multilayered granular alloys |
| topic_facet |
Approximation theory Cobalt Electron transport properties Electronic structure Granular materials Relaxation time Silver Tensors Thickness measurement Anisotropic relaxation time Granular alloys Hartree-Fock approximation Multilayers |
| description |
We have calculated the electrical conductivity in the current-in-plane geometry of multilayered granular alloys composed of Co clusters embedded in Ag alternating with pure Ag layers. In particular, we have paid attention to the conductivity behavior as a function of Ag layer thickness, Co clusters' size, and degree of percolation. The electronic structure is self-consistently calculated within the unrestricted Hartree-Fock approximation using a parametrized tight binding Hamiltonian which includes a Hubbard-like term. The conductivity tensor is obtained by using the semiclassical Boltzmann equation in the anisotropic relaxation time approximation. We have used a s-d Mott-like scattering model for the electronic mean free path taking into account the Sondheimer's picture for electronic transport in thin films. We find that the experimental conductivity behavior at coalescence can be explained through the electronic band contribution. The conductivity behavior of continuous multilayers is already attained in the very early stage of percolation, as in the experiments. © 2007 American Institute of Physics. |
| format |
Artículo Artículo publishedVersion |
| author |
Milano, J. Llois, A.M. |
| author_facet |
Milano, J. Llois, A.M. |
| author_sort |
Milano, J. |
| title |
Semiclassical electronic transport calculations in multilayered granular alloys |
| title_short |
Semiclassical electronic transport calculations in multilayered granular alloys |
| title_full |
Semiclassical electronic transport calculations in multilayered granular alloys |
| title_fullStr |
Semiclassical electronic transport calculations in multilayered granular alloys |
| title_full_unstemmed |
Semiclassical electronic transport calculations in multilayered granular alloys |
| title_sort |
semiclassical electronic transport calculations in multilayered granular alloys |
| publishDate |
2007 |
| url |
http://hdl.handle.net/20.500.12110/paper_00218979_v102_n1_p_Milano http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v102_n1_p_Milano_oai |
| work_keys_str_mv |
AT milanoj semiclassicalelectronictransportcalculationsinmultilayeredgranularalloys AT lloisam semiclassicalelectronictransportcalculationsinmultilayeredgranularalloys |
| _version_ |
1766026546790793216 |