220 citations · 1.1k across the 35 of their papers we have counts for
6 papers · 1 filter
Stability of High-Density Two-Dimensional Excitons against a Mott Transition in High Magnetic Fields Probed by Coherent Terahertz Spectroscopy
Qi Zhang, Yongrui Wang, Weilu Gao +5
We have performed time-resolved terahertz absorption measurements on photoexcited electron-hole pairs in undoped GaAs quantum wells in magnetic fields. We probed both unbound- and…
Collective, Coherent, and Ultrastrong Coupling of 2D Electrons with Terahertz Cavity Photons
Qi Zhang, Minhan Lou, Xinwei Li +5
Nonperturbative coupling of light with condensed matter in an optical cavity is expected to reveal a host of coherent many-body phenomena and states. In addition, strong coherent l…
Evidence for a new symmetry breaking mechanism reorienting quantum Hall nematics
Q. Shi, M. A. Zudov, J. D. Watson +2
We report on the effect of in-plane magnetic field on stripe phases in higher () Landau levels of a high-mobility 2D electron gas. In accord with previous stud…
Resistively detected high-order magnetoplasmons in a high-quality 2D electron gas
Q. Shi, M. A. Zudov, L. N. Pfeiffer +3
We report on high-order magnetoplasmon resonances detected in photoresistance in high-mobility GaAs quantum wells. These resonances manifest themselves as a series of photoresistan…
Reorientation of quantum Hall stripes within a partially filled Landau level
Q. Shi, M. A. Zudov, J. D. Watson +2
We investigate the effect of the filling factor on transport anisotropies, known as stripes, in high Landau levels of a two-dimensional electron gas. We find that at certain in-pla…
Modified MBE hardware and techniques and role of gallium purity for attainment of two dimensional electron gas mobility >35 x10^6 cm^2/Vs in AlGaAs/GaAs quantum wells grown by MBE
Geoffrey C. Gardner, Saeed Fallahi, John D. Watson +1
We provide evidence that gallium purity is the primary impediment to attainment of ultra-high mobility in a two-dimensional electron gas (2DEG) in AlGaAs/GaAs heterostructures grow…