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We studied GaAs–Al0.3Ga0.7As intentionally disordered semiconductor superlattices with and without correlation of the disorder. The structural properties have been characterized by X-ray diffraction. The electronic states of the SL have been studied by photovoltage spectroscopy and compared with theoretical calculation of the miniband structure and transmission coefficient. We observed that delocalization processes take place when the disorder is correlated, confirming the theoretical expectations.

Experimental Evidence of Delocalization in Correlated Disordered Superlattices

BELLANI, VITTORIO;PARRAVICINI, GIANBATTISTA;
2000-01-01

Abstract

We studied GaAs–Al0.3Ga0.7As intentionally disordered semiconductor superlattices with and without correlation of the disorder. The structural properties have been characterized by X-ray diffraction. The electronic states of the SL have been studied by photovoltage spectroscopy and compared with theoretical calculation of the miniband structure and transmission coefficient. We observed that delocalization processes take place when the disorder is correlated, confirming the theoretical expectations.
2000
Materials Science and Engineering is concerned with admixtures of matter or the basic matter from which products are made. The category covers ceramics, paper and wood products, polymers, textiles, composites, coatings & films, and biomaterials. Other areas covered in this category include Materials Chemistry, the application of chemistry to materials design and testing; Condensed Matter/Solid State Physics, the branch of physics concerned with the structure and properties of condensed matter (superconductors, semiconductors, ferroelectrics, and dielectrics); and Physical Chemistry/Chemical Physics, the application of the concepts and laws of physics to chemical phenomena.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
sì
WOS:000087358100109
2-s2.0-0033703161
Sì, ma tipo non specificato
Inglese
Internazionale
STAMPA
7
3
823
826
4
hysica E (Low-dimensional systems and nanostructures) contains papers and review articles on the fundamental and applied aspects of physics in low-dimensional systems, including semiconductor heterostructures, mesoscopic systems, quantum wells and superlattices, two-dimensional electron systems, and quantum wires and dots. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include optical and transport properties, many-body effects, integer and fractional quantum Hall effects, single electron effects and devices, and novel phenomena. Keywords: • quantum wells and superlatttices; • novel growth and fabrication techniques for nanostructures; • heterostructures, metal-semiconductor and insulator semiconductor structures; • mesoscopic systems, quantum wires and quantum dots; • transport and tunneling; • optical- and phonons-related phenomena; • polymer-semiconductors and superconductor-semiconductor systems; • magnetic semiconductors and magnetic-semiconductor structures; • ultra-fast nonlinear optical phenomena; • novel devices and applications; • single electron devices; • graphene.
Superlattices; Correlated disorder; Anderson localization
http://dx.doi.org/doi:10.1016/S1386-9477(00)00068-0
7
info:eu-repo/semantics/article
262
Bellani, Vittorio; E., Diez; Parisinic, ; L., Tarricone; R., Hey; Parravicini, Gianbattista; F., Domínguez Adame
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/11571/100611
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