A Gate-Defined Quantum Point Contact in an InAs Two-Dimensional Electron Gas
- Resource Type
- Working Paper
- Authors
- Mittag, Christopher; Karalic, Matija; Lei, Zijin; Thomas, Candice; Tuaz, Aymeric; Hatke, Anthony T.; Gardner, Geoffrey C.; Manfra, Michael J.; Ihn, Thomas; Ensslin, Klaus
- Source
- Phys. Rev. B 100, 075422 (2019)
- Subject
- Condensed Matter - Mesoscale and Nanoscale Physics
- Language
We experimentally study quantized conductance in an electrostatically defined constriction in a high-mobility InAs two-dimensional electron gas. A parallel magnetic field lifts the spin degeneracy and allows for the observation of plateaus in integer multiples of $e^2/h$. Upon the application of a perpendicular magnetic field, spin-resolved magnetoelectric subbands are visible. Through finite bias spectroscopy we measure the subband spacings in both parallel and perpendicular direction of the magnetic field and determine the $g$-factor.