d-wave induced zero-field resonances in de pi-superconducting quantum interference devices

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

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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.
Original languageEnglish
Article number177003
Number of pages4
JournalPhysical review letters
Issue number17
Publication statusPublished - 2002

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