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Updated: Feb 10, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
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Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer.
Christopher Reeg1, Daniel Loss1, Jelena Klinovaja1
1Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
Beilstein Journal of Nanotechnology
|May 17, 2018
Summary
Induced superconductivity experiments face challenges due to large band shifts in semiconductors. Increasing superconductor thickness does not resolve these issues for topological phase realization.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Recent experiments explore induced superconductivity in 2D electron gases coupled to superconductors.
- These studies aim to realize topological phases supporting Majorana bound states.
Purpose of the Study:
- Investigate the impact of superconductor-semiconductor coupling on band structure.
- Determine the feasibility of achieving topological phases in such hybrid systems.
Main Methods:
- Theoretical analysis of band structure in superconductor-semiconductor heterostructures.
- Modeling the effects of varying superconducting layer thickness.
Main Results:
- A significant band shift is induced in the semiconductor by the superconductor.
- Increasing superconductor thickness reduces band shift but increases material parameter renormalization.
- These effects collectively hinder the realization of topological phases.
Conclusions:
- The large band shift presents a fundamental challenge for topological phase realization in these systems.
- Modifying superconductor thickness does not offer a straightforward solution to overcome these challenges.
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