6 papers
Experimental studies of T--shaped quantum dot transistors: phase-coherent electron transport
C. -T. Liang, J. E. F. Frost, M. Pepper +2
We have measured the low-temperature transport properties of a T-shaped quantum dot. Replicated oscillations superimposed on one-dimensional conductance steps are observed. These s…
Experimental evidence of a metal-insulator transition in a half-filled Landau level
C. -T. Liang, J. E. F. Frost, M. Y. Simmons +2
We have measured the low-temperature transport properties of a high-mobility front-gated GaAs/Al_{0.33}Ga_{0.67}As heterostructure. By changing the applied gate voltage, we can var…
Resonant transmission through an open quantum dot
C. -T. Liang, I. M. Castleton, J. E. F. Frost +5
We have measured the low-temperature transport properties of a quantum dot formed in a one-dimensional channel. In zero magnetic field this device shows quantized ballistic conduct…
Distribution Function Analysis of Mesoscopic Hopping Conductance Fluctuations
R. J. F. Hughes, A. K. Savchenko, J. E. F. Frost +5
Variable-range hopping (VRH) conductance fluctuations in the gate-voltage characteristics of mesoscopic GaAs and Si transistors are analyzed by means of their full distribution fun…
Ballistic Composite Fermions in Semiconductor Nanostructures
J. E. F. Frost, C. -T. Liang, D. R. Mace +3
We report the results of two fundamental transport measurements at a Landau level filling factor of 1/2. The well known ballistic electron transport phenomena of quenching of t…
The Aharonov-Bohm Effect in the Fractional Quantum Hall Regime
J. D. F. Franklin, I. Zailer, C. J. B. Ford +5
We have investigated experimentally resonant tunnelling through single-particle states formed around an antidot by a magnetic field, in the fractional quantum Hall regime. For 1/3…