Study of metal insulator transition: percolation-type in GaAs/AlGaAs 2D
| Autor: | Abdelhamid Elkaaouachi, Hassan Elidrissi, Asmaa Chakhmane |
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| Rok vydání: | 2016 |
| Předmět: |
Work (thermodynamics)
Materials science Condensed matter physics 02 engineering and technology General Chemistry Type (model theory) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic field Metal Electrical resistivity and conductivity visual_art Percolation 0103 physical sciences visual_art.visual_art_medium Exponent General Materials Science Metal–insulator transition 010306 general physics 0210 nano-technology |
| Zdroj: | Molecular Crystals and Liquid Crystals. 627:92-96 |
| ISSN: | 1563-5287 1542-1406 |
| Popis: | In this work the existence of a possible percolation transition in a dilute two dimensional hole gas in GaAs/AlGaAs within a parallel magnetic field at a fixed temperature T = 260mk is studied. Following the evolution of the electrical conductivity as a function of magnetic field at high carrier densities, we have showed the creation of a densitity inhomogeneity beyond the critical percolation leading to metallic side. These results were proved in the present article by studying the exponent characterizing the type of transition and the variation of the critical percolation densities, which are considered good indicators to observe the percolation transition. In this investigation, we have reanalyzed the data obtained by Kumar et al published in the reference [M. Kumar et al, Solid State Communications Vol. 135. pp. 57–61 (2005)]. |
| Databáze: | OpenAIRE |
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