5 papers
Metallic and Insulating behaviour in p-SiGe at nu = 3/2
P. T. Coleridge, R. L. Williams, J. Lapointe +1
Shubnikov-de Haas data is presented for a p-SiGe sample exhibiting strongly insulating behaviour at nu = 3/2. In addition to the fixed points defining a high field metal- insulator…
"Forbidden" transitions between quantum Hall and insulating phases in p-SiGe heterostructures
M. R. Sakr, Maryam Rahimi, S. V. Kravchenko +3
We show that in dilute metallic p-SiGe heterostructures, magnetic field can cause multiple quantum Hall-insulator-quantum Hall transitions. The insulating states are observed betwe…
Self-Assembled InAs Quantum Dots on Patterned InP Substrates
J. Lefebvre, P. J. Poole, J. Fraser +3
The size distribution of self-assembled InAs quantum dots grown on (001) InP under the Stranski-Krastanow growth mode is controlled using selective area/chemical beam epitaxy, whic…
Quantum Phase Transitions in the p-SiGe system
P. T. Coleridge, P. Zawadzki, A. Sachrajda +2
The rich variety of phase transitions observed in the strained p-SiGe system are considered and compared. It is shown that the integer quantum Hall effect transitions, the Hall ins…
Adiabatic Behaviour of a 2-D Hole Gas near the B=0 Metal-Insulator transition
P. T. Coleridge, A. S. Sachrajda, P. Zawadzki +2
No abstract available.