87 citations · 332 across the 7 of their papers we have counts for
7 papers
Conductivity of a 2DEG in Si/SiGe heterostructure near metal- insulator transition: role of the short and long range scattering potential
E. B. Olshanetsky, V. Renard, Z. D. Kvon +4
We report the observation of a metal-insulator transition (MIT) in a two- dimensional electron gas (2DEG) in a Si/SiGe heterostructure at zero magnetic field. On going through the…
Phonon drag thermopower and weak localization
A. Miele, R. Fletcher, E. Zaremba +3
Previous experimental work on a two-dimensional (2D) electron gas in a Si-on-sapphire device led to the conclusion that both conductivity and phonon drag thermopower are affe…
Searches for Skyrmions in the Limit of Zero g-Factor
D. R. Leadley, R. J. Nicholas, D. K. Maude +4
Energy gaps have been measured for the ferromagnetic quantum Hall effect states at v=1 and 3 in GaAs/GaAlAs heterojunctions as a function of Zeeman energy, which is reduced to zero…
Critical Collapse of the Exchange Enhanced Spin Splitting in 2-D Systems
D. R. Leadley, R. J. Nicholas, J. J. Harris +1
The critical filling factor v_c where Shubnikov-de Haas oscillations become spin split is investigated for a set of GaAs-GaAlAs heterojunctions. Finite temperature magnetoresistanc…
Fractional Quantum Hall Effect Measurements at Zero g-Factor
D. R. Leadley, R. J. Nicholas, D. K. Maude +4
Fractional quantum Hall effect energy gaps have been measured in GaAs/GaAlAs heterojunctions as a function of Zeeman energy, which is varied by applying hydrostatic pressure up to…
Magnetotransport in a pseudomorphic GaAs/GaInAs/GaAlAs heterostructure with a Si delta-doping layer
M. van der Burgt, V. C. Karavolas, F. M. Peeters +6
Magnetotransport properties of a pseudomorphic GaAs/Ga0.8In0.2As/Ga0.75Al0.25As heterostructure are investigated in pulsed magnetic fields up to 50 T and at temperatures of T=1.4 K…
Pulsed Magnetic Field Measurements of the Composite Fermion Effective Mass
D. R. Leadley, M. van der Burgt, R. J. Nicholas +2
Magnetotransport measurements of Composite Fermions (CF) are reported in 50 T pulsed magnetic fields. The CF effective mass is found to increase approximately linearly with the eff…