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Updated: May 29, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Edge states of Sr2RuO4 detected by in-plane tunneling spectroscopy
Satoshi Kashiwaya1, Hiromi Kashiwaya, Hiroshi Kambara
1National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
Abstract:
Tunneling spectroscopy has been performed on Sr(2)RuO(4) searching for the edge states peculiar to topological superconductivity. Conductance spectra exhibit broad humps with three types of peak shape: domelike peak, split peak, and two-step peak. By comparing the experiments with predictions for unconventional superconductivity, these varieties are shown to originate from multiband chiral p-wave symmetry with weak anisotropy of pair amplitude. The broad hump in the conductance spectrum is a direct manifestation of the edge state due to chiral p-wave superconductivity.
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