Report

Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba2Cu3O6+x

Science  12 Jul 2012:

DOI: 10.1126/science.1223532

You are currently viewing the abstract.

View Full Text

Via your Institution

Log in through your institution

Log in through your institution


Abstract

There are increasing indications that superconductivity competes with other orders in cuprate superconductors, but obtaining direct evidence with bulk-sensitive probes is challenging. We have used resonant soft x-ray scattering to identify two-dimensional charge fluctuations with an incommensurate periodicity of ~3.2 lattice units, a, in the copper-oxide planes of the superconductors (Y,Nd)Ba2Cu3O6+x with hole concentrations 0.09 ≤ p ≤ 0.13 per planar Cu ion. The intensity and correlation length of the fluctuation signal increase strongly upon cooling down to the superconducting transition temperature, Tc; further cooling below Tc abruptly reverses the divergence of the charge correlations. In combination with prior observations of a large gap in the spin excitation spectrum, these data indicate an incipient charge-density-wave instability that competes with superconductivity.

View Full Text

Cited By...