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Theory of Josephson Phenomena in Superfluid 3He | | Erkki Thuneberg
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19 Sep 2005 | | Subject: | Superconductivity; Mesoscopic Systems and Quantum Hall Effect | cond-mat.supr-con cond-mat.mes-hall | | Affiliation: | University of Oulu | | Abstract: | Quite detailed theoretical description of superfluid 3He is possible on length scales that are much larger than the atomic scale. We discuss weak links between two bulk states of 3He-B. The current through the weak link is determined by the bound states at the link. The bound state energies are spin split depending on the order parameters in the bulk. As a result, unusual current-phase relations with pi state appear. For not too weak links, the order parameter in the bulk is modified because of the Josephson coupling. This leads to a stronger pi state and to an additional current at constant pressure bias. The theoretical results are compared with experiments. | | Source: | arXiv, cond-mat/0509504 | | Services: | Forum | Review | PDF | Favorites | |
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