Publications by authors named "Yuusuke Takeshige"
The Josephson junction of a strong spin-orbit material under a magnetic field is a promising Majorana fermion candidate. Supercurrent enhancement by a magnetic field has been observed in the InAs nanowire Josephson junctions and assigned to a topological transition. In this work we observe a similar phenomenon but discuss the nontopological origin by considering the trapping of quasiparticles by vortices that penetrate the superconductor under a finite magnetic field.
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- Cooper pair splitting (CPS) creates nonlocal correlations between normal conductors connected to a superconductor, which is essential for generating entangled electron pairs and studying Majorana fermions without needing a magnetic field.
- This study focuses on CPS using a Josephson junction made from gate-tunable ballistic InAs double nanowires, where results show that interwire superconductivity is stronger than intrawire superconductivity.
- The findings reveal that the CPS effect is linked to one-dimensional electron-electron interactions, providing a foundation for advancing CPS techniques and engineering Majorana fermions in similar nanowire setups.