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Published on: August 2, 2019
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Four-terminal Josephson junctions: diode effects, anomalous currents and transverse currents
Bijay Kumar Sahoo Kumar Sahoo1, Abhiram Soori1
1School of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad 500046, India.
Summary
This study explores a novel Josephson junction with spin-orbit coupling, revealing anomalous Josephson effects and Josephson diode effects in both longitudinal and transverse currents, enabling nonreciprocal superconducting transport.
Area of Science:
- Condensed Matter Physics
- Quantum Transport
Background:
- Josephson junctions are fundamental in superconductivity research.
- Spin-orbit coupling and Zeeman fields introduce complex electronic behaviors.
Purpose of the Study:
- Investigate nonreciprocal transport in a multi-terminal Josephson junction.
- Explore anomalous Josephson effect (AJE) and Josephson diode effect (JDE) in longitudinal and transverse currents.
Main Methods:
- Fabrication and measurement of a multi-terminal Josephson junction with a spin-orbit-coupled region.
- Application of an in-plane Zeeman field and phase bias.
- Analysis of longitudinal and transverse Josephson currents.
Main Results:
- Observed AJE and JDE in longitudinal currents due to broken kx symmetry.
- Observed AJE and JDE in transverse currents due to broken ky symmetry.
- Achieved a transverse JDE coefficient up to 500% with potential for unidirectional transport.
Conclusions:
- The proposed device enables engineering of nonreciprocal superconducting transport.
- Demonstrated a new platform for studying planar Hall effect in superconductors.
- Highlights potential for superconducting circuit applications requiring directional current flow.
Keywords:
Josephson Hall effectJosephson diode effectJosephson effecttransverse Josephson diode effecttransverse currentsMore Related Videos
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