Nodeless spin triplet superconducting gap in Sr2RuO4

Details Nodeless spin triplet superconducting gap in Sr2RuO4 Nodeless spin triplet superconducting gap in Sr2RuO4

2008-10-27

arxiv.org/abs/0810.4810v2

New J. Phys. 11 (2009) 093004

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1088/1367-2630/11/9/093004

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 $\Delta$=0.28 meV, which disappears at T$_c$ = 1.5 K. $\Delta$ is close to the result expected from weak coupling BCS theory ($\Delta_0$=1.76kBT$_c$ = 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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