Year: 2000
Type: article
Abstract: The superconducting gap function of ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ was investigated by means of quasiparticle reflection and transmission at the normal conductor-superconductor interface of ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}\ensuremath{-}\mathrm{P}\mathrm{t}$ point contacts. We found two distinctly different types of $\mathrm{dV}/\mathrm{dI}$ vs $V$ spectra either with a double-minimum structure or with a zero-bias conductance anomaly. Both types of spectra are expected in the limit of high and low transparency, respectively, of the interface barrier between a normal metal and a spin-triplet superconductor. Together with the temperature dependence of the spectra this result strongly supports a spin-triplet superconducting order parameter for ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$.
Source: Physical Review Letters
Institutions: Karlsruhe Institute of Technology, University of Augsburg
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2004959969