CEC-ICMC 2015 - Timetable, Abstracts and Presentations

The study of metal-insulator transition at very low temperature in p-type 70Ge:Ga semiconductor by applying the scaling laws

Not scheduled

2h

JW Marriott Starr Pass Resort

Poster Presentation ICMC-05 - Thin Films

Speaker

Prof. Abdelhamid El kaaouachi (University Ibn Zorh Faculty of sciences, Agadir, Morocco)

Description

We studied the metal-insulator transition (MIT) induced by the magnetic field, in barely metallic and compensated p-type. 70Ge:Ga using the scaling laws, at low temperature in range (0.65 -0048 K) and in magnetic field up to 5.3 T. We have determined the magnetic field for which the conductivity changes from the metallic behaviour to the insulator regime. On the metal side of the MIT, the electrical conductivity obeys the relation σ = σ0 + mT1/2 down 48 mK. The zero-temperatureconductivity can be described by scaling laws.We reanalyzed experimental data already published in reference " MichioWatanabe, Kohei M. Itoh, Youiti Ootuka, and Eugene E. Haller , Phys. Rev. B. 60, 15 817-15 823 (1999).".