Competition between s-wave order and d-wave order in holographic superconductors

Understand

We study competition between s-wave order and d-wave order through two holographic superconductor models.

• We find that once the coexisting phase appears, it is always thermodynamically favored, and that the coexistence phase is narrow and one condensate tends to kill the other.
• The phase diagram is constructed for each model in terms of temperature and the ratio of charges of two orders.
• We further compare the behaviors of some thermodynamic quantities, and discuss the different aspects and identical ones between two models.