TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.17.4.101
TI  - Engineered Josephson diode effect in kinked Rashba nanochannels
PY  - 2024/10/02
UR  - https://scipost.org/SciPostPhys.17.4.101
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 17
IS  - 4
SP  - 101
A1  - Maiellaro, Alfonso
AU  - Trama, Mattia
AU  - Settino, Jacopo
AU  - Guarcello, Claudio
AU  - Romeo, Francesco
AU  - Citro, Roberta
AB  - The superconducting diode effect, reminiscent of the unidirectional charge transport in semiconductor diodes, is characterized by a nonreciprocal, dissipationless flow of Cooper pairs. This remarkable phenomenon arises from the interplay between symmetry constraints and the inherent quantum behavior of superconductors. Here, we explore the geometric control of the diode effect in a kinked nanostrip Josephson junction based on a two-dimensional electron gas (2DEGs) with Rashba spin-orbit interaction. We provide a comprehensive analysis of the diode effect as a function of the kink angle and the out-of-plane magnetic field. Our analysis reveals a rich phase diagram, showcasing a geometry and field-controlled diode effect. The phase diagram also reveals the presence of an anomalous Josephson effect related to the emergence of trivial zero-energy Andreev bound states, which can evolve into Majorana bound states. Our findings indicate that the exceptional synergy between geometric control of the diode effect and topological phases can be effectively leveraged to design and optimize superconducting devices with tailored transport properties.
ER  -

@Article{10.21468/SciPostPhys.17.4.101,
	title={{Engineered Josephson diode effect in kinked Rashba nanochannels}},
	author={Alfonso Maiellaro and Mattia Trama and Jacopo Settino and Claudio Guarcello and Francesco Romeo and Roberta Citro},
	journal={SciPost Phys.},
	volume={17},
	pages={101},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.17.4.101},
	url={https://scipost.org/10.21468/SciPostPhys.17.4.101},
}