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Related Experiment Video

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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Published on: June 3, 2015

Enhanced Cooper-Pair Injection into a Semiconductor Structure by Resonant Tunneling.

Shlomi Bouscher¹, Dmitry Panna¹, Krishna Balasubramanian¹

¹Department of Electrical Engineering, Technion, Haifa 32000, Israel.

Physical Review Letters

|April 8, 2022

Summary

This summary is machine-generated.

We enhanced Cooper-pair injection efficiency in superconductor-semiconductor devices by utilizing resonant states. This breakthrough in Andreev reflection paves the way for advanced quantum technologies.

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Area of Science:

Condensed matter physics
Quantum technologies
Superconductor-semiconductor hybrid devices

Background:

Superconductor-semiconductor hybrid devices are crucial for advancing quantum technologies.
Efficient Cooper-pair injection is essential for many superconducting applications.

Purpose of the Study:

To demonstrate enhanced Andreev reflection and Cooper-pair injection efficiency.
To investigate the role of resonant states in superconductor-semiconductor interfaces.

Main Methods:

Fabrication of Nb/InGaAs/InP-based hybrid devices.
Measurement and analysis of differential conductance spectra.
Theoretical modeling using a numerical approach.

Main Results:

Observed resonant features and significantly enhanced Cooper-pair injection in samples with resonant states.
Demonstrated a lack of Cooper-pair injection in nonresonant samples.
Experimental data showed excellent agreement with theoretical modeling.

Conclusions:

Cooper-pair tunneling into semiconductor quantum well resonant states enhances Andreev reflection.
Findings support the development of novel quantum technologies like superconducting light-emitting diodes.
Opens new avenues in condensed matter physics and quantum information science.