| Autor: |
Coraiola, M., Svetogorov, A. E., Haxell, D. Z., Sabonis, D., Hinderling, M., Kate, S. C. ten, Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Cuevas, J. C., Belzig, W., Nichele, F. |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
ACS Nano 18, 9221-9231 (2024) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1021/acsnano.4c01642 |
| Popis: |
We investigate the direction-dependent switching current in a flux-tunable four-terminal Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device exhibits the Josephson diode effect, with switching currents that depend on the sign of the bias current. The superconducting diode efficiency, reaching a maximum of $|\eta|\approx34\%$, is widely tunable - both in amplitude and sign - as a function of magnetic fluxes and gate voltages. Our observations are supported by a circuit model of three parallel Josephson junctions with non-sinusoidal current-phase relation. With respect to conventional Josephson interferometers, phase-tunable multiterminal Josephson junctions enable large diode efficiencies in structurally symmetric devices, where local magnetic fluxes break both time-reversal and spatial-inversion symmetries. Our work establishes a pathway to develop Josephson diodes with wide-range tunability and that do not rely on exotic materials or externally applied magnetic fields. |
| Databáze: |
arXiv |
| Externí odkaz: |
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