170 citations · 293 across the 7 of their papers we have counts for
7 papers
Giant low-temperature piezoresistance effect in AlAs two-dimensional electrons
Y. P. Shkolnikov, K. Vakili, E. P. De Poortere +1
We present piezoresistance measurements in modulation doped AlAs quantum wells where the two-dimensional electron system occupies two conduction band valleys with elliptical Fermi…
Low-temperature, in situ tunable, uniaxial stress measurements in semiconductors using a piezoelectric actuator
M. Shayegan, K. Karrai, Y. P. Shkolnikov +3
We demonstrate the use of a piezoelectric actuator to apply, at low temperatures, uniaxial stress in the plane of a two-dimensional electron system confined to a modulation-doped A…
Ballistic transport in AlAs two-dimensional electrons
O. Gunawan, Y. P. Shkolnikov, E. P. De Poortere +2
We report the observation of commensurability oscillations in an AlAs two-dimensional electron system where two conduction-band valleys with elliptical in-plane Fermi contours are…
A Hybrid Al(0.10)Ga(0.90)As/AlAs Bilayer Electron System
E. P. De Poortere, M. Shayegan
We have fabricated a device composed of two closely coupled two-dimensional electron systems, one of which resides within an AlAs quantum well (QW) at the X point of the Brillouin…
Critical Resistance of the Quantum Hall Ferromagnet in AlAs 2D Electrons
E. P. De Poortere, E. Tutuc, M. Shayegan
Magnetic transitions in AlAs two-dimensional electrons give rise to sharp resistance spikes within the quantum Hall effect. Such spikes are likely caused by carrier scattering at m…
Field-Effect Persistent Photoconductivity
E. P. De Poortere, Y. P. Shkolnikov, M. Shayegan
We report a persistent increase or decrease in the two-dimensional electron density of AlAs or GaAs quantum wells flanked by AlGaAs barriers, brought about by illuminating the samp…