Paramagnetic and diamagnetic states in two-dimensional Josephson-junction arrays
Abstract
Many experiments on high-temperature superconductors have shown paramagnetic behavior when the sample is field cooled. The paramagnetism was first 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 (or absence) of pi-junctions. In particular the pi-junctions cause a symmetry breaking providing a measurable signature of their presence in sample.
Cite
@article{arxiv.cond-mat/0205434,
title = {Paramagnetic and diamagnetic states in two-dimensional Josephson-junction arrays},
author = {Cinzia De Leo and Giacomo Rotoli},
journal= {arXiv preprint arXiv:cond-mat/0205434},
year = {2007}
}
Comments
12 pages, 4 figures, submitted to Phys.Rev.Lett