9 papers
Effect of Nyquist Noise on the Nyquist Dephasing Rate in 2d Electron Systems
P. J. Burke, L. N. Pfeiffer, K. W. West
We measure the effect of externally applied broadband Nyquist noise on the intrinsic Nyquist dephasing rate of electrons in a two-dimensional electron gas at low temperatures. With…
New collective states of 2D electrons in high Landau levels
J. P Eisenstein, M. P. Lilly, K. B. Cooper +2
A brief summary of the emerging evidence for a new class of collective states of two-dimensional electrons in partially occupied excited Landau levels is presented. Among the most…
The Localization-Delocalization Transition in Quantum Dots
N. B. Zhitenev, M. Brodsky, R. C. Ashoori +2
Single-electron capacitance spectroscopy precisely measures the energies required to add individual electrons to a quantum dot. The spatial extent of electronic wavefunctions is pr…
New Physics in High Landau Levels
J. P. Eisenstein, M. P. Lilly, K. B. Cooper +2
Recent magneto-transport experiments on ultra-high mobility 2D electron systems in GaAs/AlGaAs heterostructures have revealed the existence of whole new classes of correlated many-…
New insulating phases of two-dimensional electrons in high Landau levels: observation of sharp thresholds to conduction
K. B. Cooper, M. P. Lilly, J. P. Eisenstein +2
The intriguing re-entrant integer quantized Hall states recently discovered in high Landau levels of high-mobility 2D electron systems are found to exhibit extremely non-linear tra…
Ultraslow Electron Spin Dynamics in GaAs Quantum Wells Probed by Optically Pumped NMR
N. N. Kuzma, P. Khandelwal, S. E. Barrett +2
Optically pumped nuclear magnetic resonance (OPNMR) measurements were performed in two different electron-doped multiple quantum well samples near the fractional quantum Hall effec…