We discuss some experimental signatures associated with the topological structures of unconventional superconductor order parameters of form $d_{x^2-y^2}+ix$, where $x=s$, $p_x\pm p_y$, or $d_{xy}$. Specifically, we study the topological surface states on the $\left(110\right)$ and equivalent surfaces of such superconductors which are observable in Andreev tunneling experiments, as well as evaluate the magnetic flux trapped in superconducting rings of such superconductors with multiple grain-boundary Josephson junctions. Previous experiments are examined and several new experiments suggested.

• Received 23 March 2004

DOI:https://doi.org/10.1103/PhysRevB.70.054514