d-Wave Induced Zero-Field Resonances in dc π-Superconducting Quantum Interference Devices

B. Chesca; R. R. Schulz; B. Goetz; C. W. Schneider; H. Hilgenkamp; J. Mannhart

doi:10.1103/PhysRevLett.88.177003

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d-Wave Induced Zero-Field Resonances in dc π-Superconducting Quantum Interference Devices

B. Chesca, R. R. Schulz, B. Goetz, C. W. Schneider, H. Hilgenkamp, J. Mannhart

DOI 10.1103/PhysRevLett.88.177003 · Physical Review Letters

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Abstract

A dc π SQUID consists of a superconducting ring interrupted by two Josephson junctions, one of which carries in equilibrium a π phase difference, caused, for example, by the d-wave pairing symmetry of the high- Tc cuprates. If this phase shift is maintained in the voltage state, anomalous resonance currents are expected in the SQUIDs transport characteristics. Here we report the observation of such resonances for high- Tc dc π SQUIDs, providing evidence for the influence of the d-wave symmetry on the voltage state of a Josephson junction for frequencies of several tens of GHz.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown