Studenikin, S. A., Coleridge, P. T., Yu, G., Poole, P. J.
The coupling between Zeeman spin splitting and Rashba spin-orbit terms has been studied experimentally in a gated InGaAs/InP quantum well structure by means of simultaneous measurements of the weak...
Studenikin, S. A., Potemski, M., Coleridge, P. T., Sachrajda, A. S., Wasilewski, Z. R.
We confirm the existence of magneto-resistance oscillations in a microwave-irradiated two-dimensional electron gas, first reported in a series of papers by Zudov et al. [Phys. Rev. B 64 (2001)...
Weak antilocalization in a strained InGaAs/InP quantum well structure (2003)
Studenikin, S. A., Coleridge, P. T., Poole, P. J.
Weak antilocalization (WAL) effect due to the interference corrections to the conductivity has been studied experimentally in a strained InGaAs/InP quantum well structure. From measurements in tilted...
Studenikin, S. A., Potemski, M., Coleridge, P. T., Sachrajda, A., Wasilewski, Z. R.
We confirm the existance of magneto-resistance oscillations in a microwave-irradiated two-dimensional electron gas, first reported in a series of papers by Zhudov et al. and Mani et al. In our...
Anomalous spin-orbit effects in a strained InGaAs/InP quantum well structure (2003)
Studenikin, S. A., Coleridge, P. T., Poole, P., Sachrajda, A.
There currently is a large effort to explore spin-orbit effects in semiconductor structures with the ultimate goal of manipulating electron spins with gates. A search for materials with large...
Metallic and Insulating behaviour in p-SiGe at nu = 3/2 (2002)
Coleridge, P. T., Williams, R. L., Lapointe, J., Zawadzki, P.
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 transition into...
Experimental study of weak antilocalization effect in a high mobility InGaAs/InP quantum well (2002)
Studenikin, S. A., Coleridge, P. T., Ahmed, N., Poole, P., Sachrajda, A.
The magnetoresistance associated with quantum interference corrections in a high mobility, gated InGaAs/InP quantum well structure is studied as a function of temperature, gate voltage, and angle of...
Scaling behaviour of metal-insulator transitions in a Si/SiGe two dimensional hole gas (2002)
Possanzini, C., Ponomarenko, L., Visser, A. De, Olsthoorn, S.M., Fletcher, R., ...
"Forbidden" transitions between quantum Hall and insulating phases in p-SiGe heterostructures (2001)
Sakr, M. R., Rahimi, Maryam, Kravchenko, S. V., Coleridge, P. T., Williams, R. L., Lapointe, J.
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 between quantum Hall...
Scaling behaviour of metal-insulator transitions in a Si/SiGe two dimensional hole gas (2001)
Possanzini, C., Ponomarenko, L., Visser, A. De, Olsthoorn, S.M., Fletcher, R., ...
Interaction effects and the metallic phase in p-SiGe (2000)
Coleridge, P. T., Sachrajda, A. S., Zawadzki, P.
Magnetoresistance results are presented for p-SiGe samples on the metallic side of the B=0 metal-insulator transition. The results cannot be understood within the framework of standard theories for...
Weak localisation, interaction effects and the metallic phase in p-SiGe (1999)
Coleridge, P. T., Sachrajda, A. S., Zawadzki, P.
Magnetoresistance results are presented for p-SiGe samples on the metallic side of the B=0 metal-insulator transition. It was possible to separate the weak localisation and Zeeman interaction effects...
Quantum Phase Transitions in the p-SiGe system (1999)
Coleridge, P. T., Zawadzki, P., Sachrajda, A., Feng, Y., Williams, R. L.
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 insulating transition...
Universal Behaviour of Metal-Insulator Transitions in the p-SiGe System (1999)
Coleridge, P. T., Zawadzki, P., Sachrajda, A. S., Williams, R. L., Feng, Y.
Magnetoresistance measurements are presented for a strained p-SiGe quantum well sample where the density is varied through the B=0 metal-insulator transition. The close relationship between this...
On the thermal broadening of a quantum critical phase transition (1999)
Coleridge, P. T., Zawadzki, P.
The temperature dependence of an integer Quantum Hall effect transition is studied in a sample where the disorder is dominated by short-ranged potential scattering. At low temperatures the results...
Universality in an integer Quantum Hall transition (1999)
An integer Quantum Hall effect transition is studied in a modulation doped p-SiGe sample. In contrast to most examples of such transitions the longitudinal and Hall conductivities at the critical...
Coleridge,P. T., Templeton,I. M.
A marked scattering anomaly has been observed for belly electrons in very dilute Cu-Cr alloys. The anomaly is strongly sensitive to magnetic field, temperature and solute concentration. (Author)
Adiabatic Behaviour of a 2-D Hole Gas near the B=0 Metal-Insulator transition (1998)
Coleridge, P. T., Sachrajda, A. S., Zawadzki, P., Williams, R. L., Feng, Y.
No abstract available.
Composite fermions in magnetic focusing and commensurability experiments. (1998)
Smet, J. H., Weiss, D., Von Klitzing, K., Fleischmann, R., Ketzmerick, R., Geisel, T., ...
Composite fermions in periodic and random antidot lattices (1997)
Smet, J. H., Weiss, D., Von Klitzing, K., Coleridge, P. T., Wasilewski, Z. W., Bergmann, R., ...
The longitudinal and Hall magnetoresistance of random and periodic arrays of artificial scatterers, imposed on a high-mobility two-dimensional electron gas, were investigated in the vicinity of...
Metal Insulator transition at B=0 in p-SiGe (1997)
Coleridge, P. T., Williams, R. L., Feng, Y., Zawadzki, P.
Observations are reported of a metal-insulator transition in a 2D hole gas in asymmetrically doped strained SiGe quantum wells. The metallic phase, which appears at low temperatures in these high...
The Quantum Hall Effect and Inter-edge State Tunneling Within a Barrier (1995)
Johnson, B. L., Sachrajda, A. S., Kirczenow, G., Feng, Y., Taylor, R. P., Henning, L., ...
We have introduced a controllable nano-scale incursion into a potential barrier imposed across a two-dimensional electron gas, and report on the phenomena that we observe as the incursion develops....