28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Metal Insulator Transition due to Density inhomogeneity at very low temperature and evidence for the correlated hopping mechanism in absence of magnetic field in p-GaAs

Not scheduled
2h
JW Marriott Starr Pass Resort

JW Marriott Starr Pass Resort

Tucson, Arizona USA
Poster Presentation ICMC-05 - Thin Films

Speakers

Prof. Abdelhamid El kaaouachi (Faculty of sciebces, University Ibnou Zohr, Agadir, Morocco)Prof. Jamal Hemine (Université Hassan II – Mohammedia, Faculté des Sciences Ben M’sik, Avenue Colonel Driss El Harti, B.P.7955, Sidi Othman, Casablanca, Morocco)

Description

In this work, we present a study of the temperature and carriers density dependence of the electrical transport of high mobility two dimensional hole system grown on the (311) surface of GaAs. At low temperatures, the analysis of the variation of conductivity data shows that a density inhomogeneity in the metallic phase leading to percolation-type transition to an insulating state at a critical density. Secondly, we investigated the temperature dependence of resistivity in the absence of the magnetic field near the metal-insulator transition of a high mobility of holes system in two dimensions grown on the (311) surface GaAs. We provide evidence of correlated hopping by observing the low Coulomb energy TES and the concomitantly smaller than predicted CES in single electron hopping picture. Even in the presence of multi-electron hopping, single-particle scaling form is maintained. Hence,we use the scaling form to manifest the crossover between Coulomb hopping and screened Mott hopping

Primary author

Prof. Jamal Hemine (Université Hassan II – Mohammedia, Faculté des Sciences Ben M’sik, Avenue Colonel Driss El Harti, B.P.7955, Sidi Othman, Casablanca, Morocco)

Co-authors

Prof. Abdelhamid El kaaouachi (Faculty of sciebces, University Ibnou Zohr, Agadir, Morocco) Prof. Hassan El idrissi (Université Hassan II – Mohammedia, Faculté des Sciences Ben M’sik, Avenue Colonel Driss El Harti, B.P.7955, Sidi Othman, Casablanca, Morocco)

Presentation Materials

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