Incompatibility of modulated checkerboard patterns with the neutron scattering resonance peak in cuprate superconductors - Condensed Matter > SuperconductivityReport as inadecuate




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Abstract: Checkerboard patterns have been proposed in order to explain STM experimentson the cuprates BSCCO and Na-CCOC. However the presence of these patterns hasnot been confirmed by a bulk probe such as neutron scattering. In particular,simple checkerboard patterns are inconsistent with neutron scattering data, inthat they have low energy incommsensurate IC spin peaks rotated 45 degreesfrom the direction of the charge IC peaks. However, it is unclear whether othercheckerboard patterns can solve the problem. In this paper, we have studiedmore complicated checkerboard patterns -modulated checkerboards- by usingspin wave theory and analyzed noncollinear checkerboards as well. We find thatthe high energy response of the modulated checkerboards is inconsistent withneutron scattering results, since they fail to exhibit a resonance peak atpi,pi, which has recently been shown to be a universal feature of cupratesuperconductors. We further argue that the newly proposed noncollinearcheckerboard also lacks a resonance peak. We thus conclude that to date nocheckerboard pattern has been proposed which satisfies both the low energyconstraints and the high energy constraints imposed by the current body ofexperimental data in cuprate superconductors.



Author: D. X. Yao, E. W. Carlson

Source: https://arxiv.org/







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