Three-Dimensional Superconductivity in the Infinite-Layer Compound Sr_{0.9}La_{0.1}CuO_2 in Entire Region below $T_c$

Abstract

The infinite-layer compound ACuO${}_2$ (A $=$ alkaline-earth ions) is regarded as the most suitable material for exploring the fundamental nature of the CuO${}_2$ plane because it does not contain a charge-reservoir block, such as a rock-salt or a fluorite like block. We report that superconductivity in the infinite-layer compound Sr${}_{0.9}$La${}_{0.1}$CuO${}_2$ is of a three-dimensional nature, in contrast to the quasi two-dimensional superconducting behavior of all other cuprates. The key observation is that the $c$-axis coherence length is longer than the $c$-axis lattice constant even at zero temperature. This means that the superconducting order parameter of one CuO${}_2$ plane overlaps with those of neighboring CuO${}_2$ planes all the temperatures below the $T_c$. Among all cuprates, only the infinite-layer superconductor shows such a feature.

4 pages and 4 figures

References in corpus (2)

• Thermodynamic and Transport Properties of Superconducting $M{g}^{10}{B}_2$
• Superconductivity and Spin Fluctuations in the Electron-Doped Infinitely-Layered High Tc Superconductor Sr${}_0.9$La${}_0.1$CuO${}_2$ (Tc=42K)

Cited by in corpus (3)

• Muon-Spin-Rotation Measurements of the Penetration Depth in the Infinite-Layer Electron-Doped Cuprate Superconductor Sr0.9La0.1CuO2
• Bulk Evidence for s-Wave Pairing Symmetry in the n-Type Infinite-Layer Cuprate $S{r}_{0.9}L{a}_{0.1}Cu{O}_2$
• Dimensionality of superconductivity in the infinite-layer high-temperature cuprate Sr0.9M0.1CuO2 (M = La, Gd)