Giant low-temperature piezoresistance effect in AlAs two-dimensional electrons
Giant low-temperature piezoresistance effect in AlAs two-dimensional electrons
We present piezoresistance measurements in modulation doped AlAs quantum wells where the two-dimensional electron system occupies two conduction band valleys with elliptical Fermi contours. Our data demonstrate that, at low temperatures, the strain gauge factor (the fractional change in resistance divided by the sampleās fractional length change) in this system ā¦