Hole mobility in modulation-doped heterostructures: GaAs-AlGaAs

Towards higher electron mobility in modulation doped GaAs/AlGaAs core shell nanowires.

Precise control over the electrical conductivity of semiconductor nanowires is a crucial prerequisite for implementation of these nanostructures into novel electronic and optoelectronic devices. Advances in our understanding of doping mechanisms in nanowires and their influence on electron mobility and radiative efficiency are urgently required. Here, we investigate the electronic properties of...

ON THE MOBILITY OF GaAs-AlGaAs HETEROSTRUCTURES WITH AN IMPURITY LAYER IN THE GaAs

Finite Temperature Resonant Magnetotunneling in AlGaAs - GaAs - AlGaAs Heterostructures Ø

We have analyzed the effect of electron-LO phonon interaction in a doublebarrier resonant tunneling structure under a magnetic field B applied parallel to the tunneling current. While the low temperature anti-crossing phenomenon has already been investigated, here we study the phonon absorption resonant magnetotunneling at finite temperatures. The Matsubara technique is used to sum up resonant ...

Fabrication and Characterization of a Single Hole Transistor in p-type GaAs/AlGaAs Heterostructures

Most spin qubit research to date has focused on manipulating single electron spins in quantum dots. However, hole spins are predicted to have some advantages over electron spins, such as reduced coupling to host semiconductor nuclear spins and the ability to control hole spins electrically using the large spin-orbit interaction. Building on recent advances in fabricating high-mobility 2D hole s...

Laterally defined freely suspended quantum dots in GaAs/AlGaAs heterostructures.

Free-standing beams containing a two-dimensional electron system are shaped from a GaAs/AlGaAs heterostructure. Quantum point contacts and (double) quantum dots are laterally defined using metal top gates. We investigate the electronic properties of these nanostructures by transport spectroscopy. Tunable localized electron states in freely suspended nanostructures are a promising tool to invest...