Generic First Order Orientation Transition of Vortex Lattices in Type II Superconductors

Details Generic First Order Orientation Transition of Vortex Lattices in Type II Superconductors Generic First Order Orientation Transition of Vortex Lattices in Type II Superconductors

2009-10-02

arxiv.org/abs/0910.0330v2

J. Phys. Soc. Jpn. 79, 013702 (2010)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, some typos are corrected

Scientific paper

10.1143/JPSJ.79.013702

First order transition of vortex lattices (VL) observed in various superconductors with four-fold symmetry is explained microscopically by quasi-classical Eilenberger theory combined with nonlocal London theory. This transition is intrinsic in the generic successive VL phase transition due to either gap or Fermi velocity anisotropies. This is also suggested by the electronic states around vortices. Ultimate origin of this phenomenon is attributed to some what hidden frustrations of a spontaneous symmetry broken hexagonal VL on the underlying four-fold crystalline symmetry.

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