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Correlation between band structure and magneto-transport properties in far-infrared detector modulated nanostructures superlattice


 
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1. Title Title of document Correlation between band structure and magneto-transport properties in far-infrared detector modulated nanostructures superlattice
 
2. Creator Author's name, affiliation, country R. Morghi; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country A. Nafidi; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country M. Braigue; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country H. Chaib; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country J. Hemine; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country A. Tirbiyine; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country B. Er-Raha; Group of Condensed Matter Physics, Department of Physics, Faculty of Sciences, P.O. Box 8106 Dakhla, University Ibn Zohr, 80000 Agadir; Morocco
 
2. Creator Author's name, affiliation, country M. Garcia Enrique; Dto. de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid; Spain
 
2. Creator Author's name, affiliation, country M. D'Astuto; IMPMC, CNRS UMR7590 UPMC, 140 rue de Lourmel, 75015 Paris; France
 
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4. Description Abstract We report here carrier’s magneto-transport properties and the band structure results for II-IV semiconductors. HgTe is a zero gap semiconductor when it is sandwiched between CdTe layers to yield to a small gap HgTe/CdTe superlattice which is the key of an infrared detector. Our sample, grown by MBE, had a period d (100 layers) of 18 nm (HgTe) / 4.4 nm (CdTe). Calculations of the spectra of energy E(kz) and E(kp), respectively, in the direction of growth and in the plane of the superlattice were performed in the envelope function formalism. The angular dependence of the transverse magnetoresistance follows the two-dimensional (2D) behavior with Shubnikov-de Haas oscillations. At low temperature, the sample exhibits p type conductivity with a hole mobility of 900 cm²/V.s. A reversal the sign of the weak-field Hall coefficient occurs at 25 K with an electron mobility of 3 104 cm2/Vs. In intrinsic regime, the measured Eg ≈ 38 meV agrees with calculated Eg(Γ,300 K) = 34 meV which coincide with the Fermi level energy. The formalism used here predicts that this narrow gap sample is semi metallic, quasi-two-dimensional and far-infrared detector.
 
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7. Date (YYYY-MM-DD) 18-03-2011
 
8. Type Status & genre Peer-reviewed Article
 
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9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://revues.imist.ma/index.php/MJCM/article/view/239
 
11. Source Title; vol., no. (year) Moroccan Journal of Condensed Matter; Vol 12, No 1 (2010)
 
12. Language English=en en
 
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15. Rights Copyright and permissions Copyright (c)