Publications

We determine the spin susceptibility in a variable-density two-dimensional electron system in GaAs/AlGaAs.

We determine the spin susceptibility in a two-dimensional electron system in GaAs/AlGaAs over a wide range of low densities from 2x10(9) cm(-2) to 4x10(10) cm(-2).

Neutral spin texture (ST) excitations at nu=1/3 are directly observed for the first time by resonant inelastic light scattering. They are determined to involve two simultaneous spin flips.

Using a combination of heat pulse and nuclear magnetic resonance techniques, we demonstrate that the phase boundary separating the interlayer phase coherent quantum Hall effect at nu(T)=1 in bilaye

The transition from partial to complete spin polarization of two-dimensional electrons at half filling of the lowest Landau level has been studied using resistively detected nuclear magnetic resona

Forbidden final states for chalcogen double donors in Si have been observed in uniaxial stress studies in which forbidden and allowed final states are stress-tuned into near resonance, The 1s(E) b

The magnetic excitations of the square-lattice spin-1/2 antiferromagnet and high-ir, parent compound La2CuO4 are determined using high-resolution inelastic neutron scattering.

Magnetothermal data are presented for the compound SrCr sub 8-x Ga sub 4+x O sub 19, for a wide range of temperature, field, and dilution strengths.

We report on measurements of quantum many-body modes in ballistic wires and their dependence on Coulomb interactions, obtained by tunneling between two parallel wires in an GaAs/AlGaAs heterostruct

By combining optical spin injection techniques with transport spectroscopy tools, we demonstrate a spin-photodetector allowing for the electrical measurement and active filtering of conduction band