We report on tunneling spectroscopy measurements using a Scanning Tunneling Microscope (STM) on the spin triplet superconductor Sr2RuO4. We find a negligible density of states close to the Fermi level and a fully opened gap with a value of $Δ$=0.28 meV, which disappears at Tc = 1.5 K. $Δ$ is close to the result expected from weak coupling BCS theory (Δ₀=1.76kBTc = 0.229 meV). Odd parity superconductivity is associated with a fully isotropic gap without nodes over a significant part of the Fermi surface.
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Suderow et al. (2008) studied this question.