Analysis on the stability of Josephson vortices at tricrystal boundaries: A $3\phi_0$/2-flux case

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Susanto, H. and Gils van, S.A. and Doelman, A. and Derks, G. (2004) Analysis on the stability of Josephson vortices at tricrystal boundaries: A $3\phi_0$/2-flux case. Physical Review B: Condensed matter and materials physics, 69 (21). p. 212503. ISSN 1098-0121

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Abstract:We consider Josephson vortices at tricrystal boundaries. We discuss the specific case of a tricrystal boundary with a $\pi$ junction as one of the three arms. It is recently shown that the static system admits an $(n+ 1/2)\phi_0$ flux, $n=0,1,2$ [Phys. Rev. B 61, 9122 (2000)]. Here we present an analysis to calculate the linear stability of the admitted states. In particular, we calculate the stability of a $3\phi_0$/2 flux. This state is of interest, since energetically this state is preferable for some combinations of Josephson lengths, but we show that in general it is linearly unstable. Finally, we propose a system that can have a stable $(n+ 1/2)\phi_0$ state.
Item Type:Article
Copyright:© 2004 American Physical Society
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/68242
Official URL:http://dx.doi.org/10.1103/PhysRevB.69.212503
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