Abstract
Spin triplet, p-wave superfluidity was discovered in He-3 a quarter of a
century ago, and unconventional spin singlet d-wave superconductivity is
now known to exist in the high-temperature superconducting cuprates, An
established example of a spin triplet superconductor has still however,
been lacking, In the past few years, evidence suggesting the existence
of triplet pairing has been reported in several correlated electron
compounds, with perhaps the most consistent picture emerging in the
layered perovskite oxide Sr2RuO4. A brief review is given of the recent
developments, stressing the important role played by high-quality
samples with long mean free paths. (C) 2000 Elsevier Science B.V. All
rights reserved.
