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Related Experiment Video

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Transverse spin current in the s-wave/p-wave Josephson junction.

Huan Zhang¹, K S Chan, Zijing Lin

¹Department of Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|September 29, 2011

Summary

This study explores spin transport in hybrid Josephson junctions. Researchers predict and demonstrate transverse spin currents and spin density, useful for identifying p-wave superconductor pairing symmetry.

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Area of Science:

Condensed Matter Physics
Quantum Superconductivity
Spintronics

Background:

Hybrid Josephson junctions involve interfaces between different superconducting materials.
Understanding spin transport is crucial for developing advanced electronic devices.

Purpose of the Study:

To theoretically investigate spin transport in hybrid Josephson junctions.
To analyze spin density and spin current behavior at the superconductor interface.
To explore the influence of a normal metal layer on spin transport.

Main Methods:

Theoretical analysis using symmetry arguments.
Numerical simulations employing the lattice Matsubara Green's function method.

Main Results:

Predicted no net spin density at the interface, but a transverse mode-resolved spin density.
Demonstrated a non-zero transverse spin current flowing along the junction interface.
Observed that spin current and transverse spin density are localized at interfaces when a normal metal is present.

Conclusions:

Findings aid in identifying the pairing symmetry of p-wave superconductors.
The study provides a pathway for generating spin currents in superconducting systems.