Near-surface InAs two-dimensional electron gas on a GaAs substrate: Characterization and superconducting proximity effect
Máté Sütő, Tamás Prok, Péter Makk, Magdhi Kirti, Giorgio Biasiol, Szabolcs Csonka, Endre Tóvári
DOI 10.1103/PhysRevB.106.235404 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We have studied a near-surface two-dimensional electron gas based on an InAs quantum well on a GaAs substrate. In devices without a dielectric layer we estimated large electron mobilities on the order of 105cm2/Vs. We have observed quantized conductance in a quantum point contact, and determined the g factor. Using samples with an epitaxial Al layer, we defined multiple Josephson junctions and found the critical current to be gate tunable. Based on multiple Andreev reflections the semiconductor-superconductor interface is transparent, with an induced gap of 125μeV. Our results suggest that this InAs system is a viable platform for use in hybrid topological superconductor devices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| InAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Proximity-induced gap in nanowires with a thin superconducting shell
similarity 0.92Thomas Kiendl et al.
Source status unknown — claims are unverified
Coupling and braiding Majorana bound states in networks defined in two-dimensional electron gases with proximity-induced superconductivity
similarity 0.92Michael Hell et al.
Source status unknown — claims are unverified
Current-phase relations of InAs nanowire Josephson junctions: From interacting to multimode regimes
similarity 0.92Sean Hart et al.
Source status unknown — claims are unverified
Microscopic study of the Josephson supercurrent diode effect in Josephson junctions based on two-dimensional electron gas
similarity 0.91Andreas Costa et al.
Source status unknown — claims are unverified
Microscopic mechanism of electric-field-induced superconductivity suppression in metallic thin films
similarity 0.91Alessio Zaccone et al.
Source status unknown — claims are unverified
Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator
similarity 0.91Zoltán Scherübl et al.
Source status unknown — claims are unverified