92 citations · 261 across the 13 of their papers we have counts for
19 papers · 1 filter
Kondo physics versus spin gap physics in fully spin-split quantum wires
F. Sfigakis, C. J. B. Ford, M. Pepper +4
Linear and nonlinear transport of quantum wires is investigated at a magnetic field where spin-split one-dimensional (1D) subbands are equidistant in energy. In this seldom-studied…
Radio-frequency reflectometry on large gated 2-dimensional systems
L. J. Taskinen, R. P. Starrett, T. P. Martin +5
We have embedded an AlGaAs/GaAs based, gated 2D hole system (2DHS) into an impedance transformer circuit, and show that by using radio-frequency reflectometry it is possible t…
The effect of screening long-range Coulomb interactions on the metallic behavior in two-dimensional hole systems
L. H. Ho, W. R. Clarke, A. P. Micolich +6
We have developed a technique utilizing a double quantum well heterostructure that allows us to study the effect of a nearby ground-plane on the metallic behavior in a GaAs two-dim…
Energy-level pinning and the 0.7 spin state in one dimension: GaAs quantum wires studied using finite-bias spectroscopy
A. C. Graham, D. L. Sawkey, M. Pepper +2
We study the effects of electron-electron interactions on the energy levels of GaAs quantum wires (QWs) using finite-bias spectroscopy. We probe the energy spectrum at zero magneti…
Geometric Suppression of Single-Particle Energy Spacings in Quantum Antidots
L. C. Bassett, C. P. Michael, C. J. B. Ford +4
Quantum Antidot (AD) structures have remarkable properties in the integer quantum Hall regime, exhibiting Coulomb-blockade charging and the Kondo effect despite their open geometry…
Anomalous spin-dependent behaviour of one-dimensional subbands
A. C. Graham, M. Pepper, M. Y. Simmons +1
We report a new electron interaction effect in GaAs/AlGaAs quantum wires. Using DC-bias spectroscopy, we show that large and abrupt changes occur to the energies of spin-down (lowe…