Anomalous periodicity of the current-phase relationship of grain-boundary Josephson junctions in high-Tc superconductors

E. Il’ichev; V. Zakosarenko; R. P. J. IJsselsteijn; H. E. Hoenig; V. Schultze; H.-G. Meyer; M. Grajcar; R. Hlubina

doi:10.1103/PhysRevB.60.3096

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Anomalous periodicity of the current-phase relationship of grain-boundary Josephson junctions in high-Tc superconductors

E. Il’ichev, V. Zakosarenko, R. P. J. IJsselsteijn, H. E. Hoenig, V. Schultze, H.-G. Meyer, M. Grajcar, R. Hlubina

DOI 10.1103/PhysRevB.60.3096 · Physical Review B

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Abstract

The current-phase relation (CPR) for asymmetric 45° Josephson junctions between two d-wave superconductors has been predicted to exhibit an anomalous periodicity. We have used the single-junction interferometer to investigate the CPR for these kinds of junctions in YBa2Cu3O7−x thin films. A remarkable amplitude of the π-periodical component of the CPR has been experimentally found, providing an additional source of evidence for the d-wave symmetry of the pairing state of the cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	60	Pressure not reported	unknown