Bistability in superconducting rings containing an inhomogeneous Josephson junction

Gaaß, Markus; Nadj-Perge, Stevan; Radović, Z.; Bauer, Andreas; Aprili, M.; Wegscheider, Werner; Strunk, Christoph

doi:10.1103/physrevb.77.024506

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…It is well known that self induction effects can strongly distort the current phase relation in SQUIDS (7,35). In our experiments these effects were minimized by making the SQUID loops small enough.…”

Section: S5-self Induction Effectsmentioning

confidence: 97%

Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry

et al. 2017

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The protection against backscattering provided by topology is a striking property. In two-dimensional insulators, a consequence of this topological protection is the ballistic nature of the one-dimensional helical edge states. One demonstration of ballisticity is the quantized Hall conductance. Here we provide another demonstration of ballistic transport, in the way the edge states carry a supercurrent. The system we have investigated is a micrometre-long monocrystalline bismuth nanowire with topological surfaces, that we connect to two superconducting electrodes. We have measured the relation between the Josephson current flowing through the nanowire and the superconducting phase difference at its ends, the current–phase relation. The sharp sawtooth-shaped phase-modulated current–phase relation we find demonstrates that transport occurs selectively along two ballistic edges of the nanowire. In addition, we show that a magnetic field induces 0–π transitions and φ0-junction behaviour, providing a way to manipulate the phase of the supercurrent-carrying edge states and generate spin supercurrents.

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Section: S5-self Induction Effectsmentioning

confidence: 97%

Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry

et al. 2017

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“…The fabrication process makes use of e-beam lithography and a shadow evaporation technique based on a thermostable trilayer mask system. We use a sacrificial layer of polyether sulfone (PES) as described in the work of Dubos et al [11] and a mask layer of silicon nitride (SiN) [12]. The insets to Fig.…”

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confidence: 99%

Effect of Microwaves on the Current-Phase Relation of Superconductor–Normal-Metal–Superconductor Josephson Junctions

et al. 2009

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We investigate the current-phase relation (CPR) of long diffusive superconductor-normal-metal-superconductor (Nb/Ag/Nb) Josephson junctions in thermodynamic equilibrium and under microwave irradiation. While in equilibrium good agreement with the predictions of quasiclassical theory is found, we observe that the shape of the CPR can be strongly affected by microwave irradiation. Close to a Josephson-phase difference phi approximately pi, the supercurrent can be strongly suppressed when increasing the rf power. Our results can be understood in terms of microwave excitation of low-lying Andreev bound states across the minigap in the junction. In the frequency interval studied, this mechanism becomes important, when the minigap closes at phi approximately pi.

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Bistability in superconducting rings containing an inhomogeneous Josephson junction

Cited by 2 publications

References 17 publications

Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry

Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry

Effect of Microwaves on the Current-Phase Relation of Superconductor–Normal-Metal–Superconductor Josephson Junctions

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