Stripes and superconductivity in cuprate superconductors

Details Stripes and superconductivity in cuprate superconductors Stripes and superconductivity in cuprate superconductors

2005-08-10

arxiv.org/abs/cond-mat/0508272v1

Proc. SPIE 5932, 59320C (2005)

Physics

Condensed Matter

Superconductivity

6 pp, for proceedings of SPIE mtg., July 31-Aug. 4, 2005 in San Diego

Scientific paper

10.1117/12.617556

One type of order that has been observed to compete with superconductivity in cuprates involves alternating charge and antiferromagnetic stripes. Recent neutron scattering studies indicate that the magnetic excitation spectrum of a stripe-ordered sample is very similar to that observed in superconducting samples. In fact, it now appears that there may be a universal magnetic spectrum for the cuprates. One likely implication of this universal spectrum is that stripes of a dynamic form are present in the superconducting samples. On cooling through the superconducting transition temperature, a gap opens in the magnetic spectrum, and the weight lost at low energy piles up above the gap; the transition temperature is correlated with the size of the spin gap. Depending on the magnitude of the spin gap with respect to the magnetic spectrum, the enhanced magnetic scattering at low temperature can be either commensurate or incommensurate. Connections between stripe correlations and superconductivity are discussed.

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