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

doi:10.1103/PhysRevLett.88.177003

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

Faculty of Science and Technology

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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- 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 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 language	English
Article number	177003
Number of pages	4
Journal	Physical review letters
Volume	88
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.88.177003
Publication status	Published - 2002

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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.",

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AU - Chesca, B.

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AU - Mannhart, J.

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AB - 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.

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