Interaction of paramagnetic electron with highT c supercurrent in LaSrCuO studied by (μ−O) probe

The paramagnetic state of the muonic atom formed by the negative muon (μ−) bound to the oxygen in highTc LaSrCuO which was found in our recentμ− spin rotation experiments was applied to probe an interaction between the paramagnetic electron and the highTc supercurrent. The observed enhanced spin relaxation rates of the (μ−O) system in the superconducting state revealed the presence of such an interaction.