342 citations · 1.2k across the 21 of their papers we have counts for
20 papers
Parallel Magnetic Field Tuning of Valley Splitting in AlAs Two-Dimensional Electrons
T. Gokmen, Medini Padmanabhan, O. Gunawan +4
We demonstrate that, in a quasi-two-dimensional electron system confined to an AlAs quantum well and occupying two conduction-band minima (valleys), a parallel magnetic field can c…
Valley polarization and susceptibility of composite fermions around nu=3/2
N. C. Bishop, M. Padmanabhan, K. Vakili +3
We report magnetotransport measurements of fractional quantum Hall states in an AlAs quantum well around Landau level filling factor nu = 3/2, demonstrating that the quasiparticles…
Anisotropic low-temperature piezoresistance in (311)A GaAs two-dimensional holes
B. Habib, J. Shabani, E. P. De Poortere +2
We report low-temperature resistance measurements in a modulation-doped, (311)A GaAs two-dimensional hole system as a function of applied in-plane strain. The data reveal a strong…
Quantized conductance in an AlAs 2D electron system quantum point contact
O. Gunawan, B. Habib, E. P. De Poortere +1
We report experimental results on a quantum point contact (QPC) device formed in a wide AlAs quantum well where the two-dimensional electrons occupy two in-plane valleys with ellip…
High-mobility AlAs quantum wells with out-of-plane valley occupation
K. Vakili, Y. P. Shkolnikov, E. Tutuc +3
Employing state-of-the-art molecular beam epitaxy techniques to grow thin, modulation-doped AlAs quantum wells, we have achieved a low temperature mobility of 5.5 m/Vs with out…
Valley susceptibility of an interacting two-dimensional electron system
O. Gunawan, Y. P. Shkolnikov, K. Vakili +3
We report direct measurements of the valley susceptibility, the change of valley population in response to applied symmetry-breaking strain, in an AlAs two-dimensional electron sys…