Vortex lattice stability in the SO(5) model
arXiv:cond-mat/0106172 · doi:10.1103/PhysRevB.65.140512
Abstract
We study the energetics of superconducting vortices in the SO(5) model for high- materials proposed by Zhang. We show that for a wide range of parameters normally corresponding to type II superconductivity, the free energy per unit flux $\FF(m)$ of a vortex with flux quanta is a decreasing function of , provided the doping is close to its critical value. This implies that the Abrikosov lattice is unstable, a behaviour typical of type I superconductors. For dopings far from the critical value, $\FF(m)$ can become very flat, indicating a less rigid vortex lattice, which would melt at a lower temperature than expected for a BCS superconductor.
4 pp, revtex, 5 figures
Cited by in corpus (5)
- SO(5) Theory of Antiferromagnetism and Superconductivity
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- Flux tubes and the type-I/type-II transition in a superconductor coupled to a superfluid
- Interaction between vortices in models with two order parameters
- Magnetic properties of SO(5) superconductivity