Phase Diagram for Splay Glass Superconductivity

Localization of flux lines to splayed columnar pins is studied. A sine-Gordon type renormalization group (RG) study reveals the existence of a splay glass phase and yields an analytic form for the transition temperature into the glass phase. As an independent test, the $I-V$ characteristics are determined via a molecular dynamics code. The glass transition temperature supports the RG results convincingly. The full phase diagram of the model is constructed.