40 citations · 107 across the 5 of their papers we have counts for
5 papers
Artificial electrostatic crystals: a new platform for creating correlated quantum states
Daisy Q. Wang, Zeb Krix, Olga A. Tkachenko +7
The electronic properties of solids are determined by the crystal structure and interactions between electrons, giving rise to a variety of collective phenomena including supercond…
Switching between attractive and repulsive Coulomb-interaction-mediated drag in an ambipolar GaAs/AlGaAs bilayer device
B. Zheng, A. F. Croxall, J. Waldie +5
We present measurements of Coulomb drag in an ambipolar GaAs/AlGaAs double quantum well structure that can be configured as both an electron-hole bilayer and a hole-hole bilayer, w…
Fabrication and characterisation of ambipolar devices on an undoped AlGaAs/GaAs heterostructure
J. C. H. Chen, D. Q. Wang, O. Klochan +7
We have fabricated AlGaAs/GaAs heterostructure devices in which the conduction channel can be populated with either electrons or holes simply by changing the polarity of a gate bia…
Ultra-shallow quantum dots in an undoped GaAs/AlGaAs 2D electron gas
W. Y. Mak, F. Sfigakis, K. Das Gupta +7
We report quantum dots fabricated on very shallow 2-dimensional electron gases, only 30 nm below the surface, in undoped GaAs/AlGaAs heterostructures grown by molecular beam epitax…
Distinguishing impurity concentrations in GaAs and AlGaAs, using very shallow undoped heterostructures
W. Y. Mak, K. Das Gupta, H. E. Beere +3
We demonstrate a method of making a very shallow, gateable, undoped 2-dimensional electron gas. We have developed a method of making very low resistivity contacts to these structur…