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Surface effects on the pancake vortex phase diagram

✍ Scribed by Alvise De Col; Vadim B. Geshkenbein; Gautam I. Menon; Gianni Blatter

Book ID
103889994
Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
281 KB
Volume
404
Category
Article
ISSN
0921-4534

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✦ Synopsis

We discuss the effects of a surface on the vortex system in a layered superconductor with vanishingly small Josephson coupling. Within a London theory, we derive the modified pancake vortex interaction in samples with a finite number of layers. We discuss the implications of these modifications for the zero-field transition and for the melting transition in finite fields formulated within a substrate model [Phys. Rev. Lett. 84 (2000) 2698]. Close to the surface, the lattice becomes unstable below the bulk thermodynamic melting temperature. We analyze the resulting surface-induced melting using density functional theory.

πŸ“œ SIMILAR VOLUMES

Phase diagram of a lattice of pancake vo
Phase diagram of a lattice of pancake vortex molecules
✍ Y. Tanaka; A. Crisan; D.D. Shivagan; A. Iyo; P.M. Shirage; K. Tokiwa; T. Watanab πŸ“‚ Article πŸ“… 2009 πŸ› Elsevier Science 🌐 English βš– 208 KB

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 vorte