Magnetorotons in the dispersions of collective gap modes of fractional quantum Hall liquids are determined in resonant inelastic scattering experiments.
Recent magnetotransport experiments on high mobility two-dimensional electron systems have revealed many-body electron states unique to high Landau levels.
We have observed a negative differential resistance (NDR) in a single-barrier tunneling structure in which electrons tunnel from a doped-semiconductor emitter layer into a quantum-well (QW) layer,
We have observed novel manifestations of superlattice properties in a Ga(0.47)In(0.53)As/InP quantum well photodiode structure grown by gas source molecular beam epitaxy, evident as multiple steps
We report on the first observation of optical gain from InAs nanocrystal quantum dots emitting at 1.55 microns based on a three-beam, time resolved pump-probe technique.
We developed a new material platform that enables inclusion of InAs nanocrystals, emitting at 1.55 microns, into a transparent polymer matrix while preserving their optical properties.
We report an experimental observation of a blue shift in the n = 1 heavy hole exciton line of InGaAs/InP multiple quantum wells resulting from a picosecond photoexcitation in the transparent spect
Recent orthohombic-tetragonal (OT) phase equilibria predicted by Khachaturyan and Morris have been observed experimentally in YBa sub 2 Cu sub (3-x) Fe sub x O sub 7 (0.01 - x - 0.
As a first step in an effort to generate squeezed microwave radiation, we have measured the phase sensitive gain of a Josephson parametric amplifier.
In this paper we report on a type of vortex pinning, Bitter pinning.
