Physics – Condensed Matter – Superconductivity
Scientific paper
2009-03-29
Physics
Condensed Matter
Superconductivity
This is a one-page comment on Phys. Rev. Lett. 99, 127003 (2007), by E. Berg et al
Scientific paper
In a very interesting recent Letter\cite{berg}, the authors suggested that a novel form of superconducting state is realized in La$_{2-x}$Ba$_x$CuO$_4$ with $x$ close to 1/8. This suggestion was based on experiments\cite{li} on this compound which found predominantly two-dimensional (2D) characters of the superconducting state, with extremely weak interplane coupling. Later this specific form of superconducting state was termed striped superconductors\cite{berg08}. The purpose of this Comment is to point out that the suggested form\cite{berg} of the superconducting order parameter can be detected directly using magnetic field modulated Josephson effect.
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