A. C. Gossard

Two-Dimensional Magnetotransport in the Extreme Quantum Limit

A quantized Hall plateau of ${\ensuremath{\rho}}_{\mathrm{xy}}=\frac{3h}{{e}^{2}}$, accompanied by a minimum in ${\ensuremath{\rho}}_{\mathrm{xx}}$, was observed at $T<5$ K in m...

Influence of an undoped (AlGa)As spacer on mobility enhancement in GaAs-(AlGa)As superlattices

The introduction of an undoped (AlGa)As spacer enhances significantly the low-temperature mobility in modulation-doped GaAs-(AlGa)As superlattices. Mobilities increase monotonic...

Zero-resistance state of two-dimensional electrons in a quantizing magnetic field

When the Fermi level is pinned in the energy gap between two Landau levels of two-dimensional electrons, the response of electrons in the completely filled levels to an electric...

Quantized Hall effect at low temperatures

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 temp...

g-Factor enhancement in the 2D electron gas in GaAs/AlGaAs heterojunctions

Two-dimensional electrical transport in GaAs-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">As</mml:mi></mml:math>multilayers at high magnetic fields

We have studied the magnetotransport properties of two-dimensional electrons in thin GaAs-${\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}$ multilayers with fields ...