Parallel Magnetic Field Tuning of Valley Splitting in AlAs Two-Dimensional Electrons
arXiv:0811.3194 · doi:10.1103/PhysRevB.78.233306
Abstract
We demonstrate that, in a quasi-two-dimensional electron system confined to an AlAs quantum well and occupying two conduction-band minima (valleys), a parallel magnetic field can couple to the electrons' orbital motion and tune the energies of the two valleys by different amounts. The measured density imbalance between the two valleys, which is a measure of the valley susceptibility with respect to parallel magnetic field, is enhanced compared to the predictions of non-interacting calculations, reflecting the role of electron-electron interaction.
arXiv comment4+ pages, 4 figures, accepted for publication in Phys. Rev. B
References in corpus (11)
- Valley filter and valley valve in graphene
- Valley susceptibility of an interacting two-dimensional electron system
- Two-dimensional electrons occupying multiple valleys in AlAs
- Observation of Quantum Hall Valley Skyrmions
- Role of finite layer thickness in spin-polarization of GaAs 2D electrons in strong parallel magnetic fields
- Effects of thickness on the spin susceptibility of the 2D electron gas
- Integer quantum Hall effect on a six valley hydrogen-passivated silicon (111) surface
- Dependence of spin susceptibility of a two-dimensional electron system on the valley degree of freedom
- Spin Susceptibility of Interacting Two-dimensional Electrons with Anisotropic Effective Mass
- AlAs 2D electrons in an antidot lattice: Electron pinball with elliptical Fermi contours
- Anomalous giant piezoresistance in AlAs 2D electrons with anti-dot lattices
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- Large tunable valley splitting in edge-free graphene quantum dots on boron nitride
- Emptying Dirac valleys in bismuth using high magnetic fields
- Valley Degenerate 2D Electrons in the Lowest Landau Level
- Contrast between spin and valley degrees of freedom
- Effective mass suppression upon complete spin-polarization in an isotropic two-dimensional electron system
- Orbital effects of a strong in-plane magnetic field on a gate-defined quantum dot
- Realization of a Valley Superlattice
- Valley-tunable, even-denominator fractional quantum Hall state in the lowest Landau level of an anisotropic system
- Valley Gapless Semiconductor: Models and Applications