Paramagnetic and diamagnetic States in two-dimensional josephson-junction arrays |
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Authors: | De Leo Cinzia Rotoli Giacomo |
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Institution: | Dipartimento di Energetica, Universitá di L'Aquila, Italy. |
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Abstract: | Many experiments on high-temperature superconductors have shown paramagnetic behavior when the sample is field cooled. The paramagnetism was attributed to a d-wave order parameter creating pi-junctions in the samples. However, the same effect was later discovered in traditional low-temperature superconductors and conventional Josephson-junction arrays which are s wave. By simulating both conventional and mixed pi/conventional Josephson-junction arrays we determine that differences exist which may be sufficient to clearly identify the presence of pi junctions. In particular, the pi junctions cause a symmetry breaking providing a measurable signature of their presence. |
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