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We studied the optical properties of ordered and intentionally disordered GaAs-Al(x)Ga(1-x)As superlattices, with and without dimer-type correlations in the disorder, by means of spectroscopic ellipsometry. The electronic structure of the superlattices has been calculated and compared with the experiments. The optical transitions in ordered, correlated, and uncorrelated disordered superlattices show specific features that we relate to their different electronic structures.

Ellipsometric characterization of random and random-dimer GaAs-Al(x)Ga(1-x)As superlattices

BELLANI, VITTORIO;PARRAVICINI, GIANBATTISTA;
2002-01-01

Abstract

We studied the optical properties of ordered and intentionally disordered GaAs-Al(x)Ga(1-x)As superlattices, with and without dimer-type correlations in the disorder, by means of spectroscopic ellipsometry. The electronic structure of the superlattices has been calculated and compared with the experiments. The optical transitions in ordered, correlated, and uncorrelated disordered superlattices show specific features that we relate to their different electronic structures.
2002
Applied Physics/Condensed Matter/Materials Science encompasses the resources of three related disciplines: Applied Physics, Condensed Matter Physics, and Materials Science. The applied physics resources are concerned with the applications of topics in condensed matter as well as optics, vacuum science, lasers, electronics, cryogenics, magnets and magnetism, acoustical physics and mechanics. The condensed matter physics resources are concerned with the study of the structure and the thermal, mechanical, electrical, magnetic and optical properties of condensed matter. They include superconductivity, surfaces, interfaces, thin films, dielectrics, ferroelectrics and semiconductors. The materials science resources are concerned with the physics and chemistry of materials and include ceramics, composites, alloys, metals and metallurgy, nanotechnology, nuclear materials, adhesion and adhesives. Resources dealing with polymeric materials are listed in the Organic Chemistry/Polymer Science category.
PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS
sì
WOS:000179677900015
2-s2.0-85038313314
Sì, ma tipo non specificato
Inglese
Internazionale
STAMPA
66
19
193310-1
193310-3
Physical Review B is the largest and most comprehensive international journal specializing in condensed matter and materials physics, publishing important papers on a wide range of topics. It has an impact factor of 3.172 (2007) and is ranked number one in total citations in condensed matter physics. It has high standards for the quality of papers it publish and for the referees that help it. It is the pre-eminent source for detailed comprehensive regular articles that are the mainstay of scientific communication.
Disordered Superlattices; Electronic Structure; Spectroscopic Ellipsometry
http://dx.doi.org/10.1103/PhysRevB.66.193310
http://link.aps.org/doi/10.1103/PhysRevB.66.193310
5
info:eu-repo/semantics/article
262
Bellani, Vittorio; Parravicini, Gianbattista; E., Diez; F., Dominguez Adame; R., Hey
1 Contributo su Rivista::1.1 Articolo in rivista
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1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/11512
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