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Phase diagram of a lattice of pancake vortex molecules

✍ Scribed by Y. Tanaka; A. Crisan; D.D. Shivagan; A. Iyo; P.M. Shirage; K. Tokiwa; T. Watanabe; N. Terada

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 208 KB
Volume: 469
Category: Article
ISSN: 0921-4534
DOI: 10.1016/j.physc.2009.05.202

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✦ Synopsis

On a superconducting bi-layer with thickness much smaller than the penetration depth, k, a vortex molecule might form. A vortex molecule is composed of two fractional vortices and a soliton wall. The soliton wall can be regarded as a Josephson vortex missing magnetic flux (degenerate Josephson vortex) due to an incomplete shielding. The magnetic energy carried by fractional vortices is less than in the conventional vortex. This energy gain can pay a cost to form a degenerate Josephson vortex. The phase diagram of the vortex molecule is rich because of its rotational freedom.

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