Single-valley high-mobility (110) AlAs quantum wells with anisotropic mass
arXiv:0807.3763 · doi:10.1063/1.2991448
Abstract
We studied a doping series of (110)-oriented AlAs quantum wells (QWs) and observed transport evidence of single anisotropic-mass valley occupancy for the electrons in a 150 Åwide QW. Our calculations of strain and quantum confinement for these samples predict single anisotropic-mass valley occupancy for well widths greater than 53 Å. Below this, double-valley occupation is predicted such that the longitudinal mass axes are collinear. We observed mobility anisotropy in the electronic transport along the crystallographic directions in the ratio of 2.8, attributed to the mass anisotropy as well as anisotropic scattering of the electrons in the X-valley of AlAs.
References in corpus (7)
- Two-dimensional electrons occupying multiple valleys in AlAs
- Quantized conductance in an AlAs 2D electron system quantum point contact
- Effective mass suppression in dilute, spin-polarized two-dimensional electron systems
- Aluminum arsenide cleaved-edge overgrown quantum wires
- Classical-to-stochastic Coulomb blockade cross-over in aluminum arsenide wires
- Donor binding energy and thermally activated persistent photoconductivity in high mobility (001) AlAs quantum wells
- AlAs 2D electrons in an antidot lattice: Electron pinball with elliptical Fermi contours