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Spin reversal effect in hybrid s(±)-wave/p-wave Josephson junction.
1Department of Physics, Southeast University, Nanjing 210096, People's Republic of China. junwang@nju.edu.cn
Summary
A hybrid Josephson junction study reveals spin reversal effects and critical current changes in s(±)-wave ferropnictide superconductors. These unique behaviors can distinguish s(±)-wave pairing from conventional s-wave symmetry.
Area of Science:
- Condensed Matter Physics
- Superconductivity
- Materials Science
Background:
- Josephson junctions are crucial for studying superconductivity.
- Ferropnictide superconductors exhibit unconventional pairing symmetries.
- Distinguishing between s(±)-wave and conventional s-wave pairing is an ongoing challenge.
Purpose of the Study:
- To theoretically investigate a hybrid Josephson junction composed of an s(±)-wave ferropnictide superconductor and a p-wave superconductor.
- To explore the impact of the intrinsic π phase shift in s(±)-wave pairing on junction properties.
- To identify unique characteristics that differentiate s(±)-wave pairing from conventional s-wave symmetry.
Main Methods:
- Theoretical modeling of a hybrid Josephson junction.
- Analysis of the effects of relative phase shifts and interface resistances.
- Investigation of temperature-dependent phenomena.
Main Results:
- An accumulated spin reversal effect was observed at the junction interface due to the π phase shift.
- The critical current demonstrated a vanishing point dependent on the ratio of interface resistances.
- Spin reversal effects intensified with increasing temperature, while critical current showed reentrant behavior.
Conclusions:
- The observed spin reversal and reentrant critical current are unique to s(±)-wave pairing.
- These phenomena provide a method to experimentally discriminate s(±)-wave pairing in ferropnictides from conventional s-wave symmetry.
- The study offers insights into the exotic properties of unconventional superconductors.
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