Phys. Rev. Lett. 88, 177003 (2002) [4 pages]d-Wave Induced Zero-Field Resonances in dc π-Superconducting Quantum Interference DevicesReceived 19 April 2001; published 16 April 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.177003
DOI:
10.1103/PhysRevLett.88.177003
PACS:
74.20.Rp, 85.25.Cp, 85.25.Dq
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