One-dimensional superconductors

We report here measurements of the excess fluctuation conductivity in one-dimensional Al samples. Because sample diameters were so small (typically, square cross sections ∼ 600 A × 600 A, we were able to measure excess conductivity over a temperature range much wider than previously possible. Good agreement with the Thompson-Maki theory is observed at temperatures T<1.3Tc. The recent theory due to Patton is also in qualitative agreement. Above 1.4Tc the data do not agree quantitatively with any theory. © 1972 The American Physical Society.