Manifestation of quantum confinement in transport properties of ultrathin metallic films

The influence of quantum size effect on the transport properties of ultrathin Cu and Fe films in the thickness range between 1 and 32 monolayers is studied by solving the linearized Boltzmann equation in the relaxation-time approximation using ab initio calculations within the framework of spin dens...

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Bibliographic Details
Published in:Thin solid films 2007-06, Vol.515 (17), p.6921-6926
Main Authors: Fedorov, Dmitry V., Zahn, Peter, Mertig, Ingrid
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Copper
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Electronic transport phenomena in thin films and low-dimensional structures
Exact sciences and technology
Iron
Physics
Quantum effects
Surface conductivity
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Summary:The influence of quantum size effect on the transport properties of ultrathin Cu and Fe films in the thickness range between 1 and 32 monolayers is studied by solving the linearized Boltzmann equation in the relaxation-time approximation using ab initio calculations within the framework of spin density functional theory. A strong manifestation of quantum confinement is found in the density of states. However, the plasma frequency shows a smooth or oscillating behavior for different film orientations. The results are in qualitative agreement to infrared-absorption experiments at Cu(111), Fe(001), and Fe(111) films.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2007.01.054