We have studied the quantized Hall effect of the two-dimensional electron gas in GaAs- ${\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}$ heterojunctions at low temperatures to 50 mK. We observe in the small-current and low-temperature limit sharp steps connecting the quantized Hall resistance plateaus. The diagonal resistivity ${\ensuremath{\rho}}_{\mathrm{xx}}$ decreases with decreasing $T$ at the Shubnikov---de Haas peaks, as well as at the dips, and is vanishingly small at magnetic fields above 40 kG.
We have produced ultrathin epitaxial graphite films which show remarkable 2D\nelectron gas (2DEG) behavior. The films, composed of typically 3 graphene\nsheets, were grown by th...
We examine the effect of long-range spatially correlated disorder on the Anderson localization transition in $d=2+\ensuremath{\epsilon}$ dimensions. This is described as a phase...
The effect of a small imaginary part ${\ensuremath{\epsilon}}_{2}$ to the dielectric constant on the propagation of waves in a disordered medium near the Anderson localization t...
It has been verified by means of the polarization microscope that rochelle salt in the ferroelectric state consists of many domains. The domain structure in an annealed crystal ...
The event rates and their recognized uncertainties are calculated for eleven solar neutrino experiments using accurate solar models. The same solar models are used to evaluate t...
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