title: d-wave induced zero-field resonances in dc pi-superconducting quantum interference devices.
abstract: A dc pi SQUID consists of a superconducting ring interrupted by two Josephson junctions, one of which carries in equilibrium a pi phase difference, caused, for example, by the d-wave pairing symmetry of the high- T(c) 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- T(c) dc pi 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.
authors: Experimentalphysik VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany.
authors: B
authors: B
authors: Chesca
authors: R R
authors: RR
authors: Schulz
authors: B
authors: B
authors: Goetz
authors: C W
authors: CW
authors: Schneider
authors: H
authors: H
authors: Hilgenkamp
authors: J
authors: J
authors: Mannhart