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Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
- Source :
- Science 337, 821 (2012)
- Publication Year :
- 2012
-
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 $\bf \sim 3.2$ lattice units in the copper-oxide planes of the superconductors (Y,Nd)Ba$_2$Cu$_3$O$_{6+x}$ with hole concentrations $0.09 \leq p \leq 0.13$ per planar Cu ion. The intensity and correlation length of the fluctuation signal increase strongly upon cooling down to the superconducting transition temperature, $T_c$; further cooling below $T_c$ 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.<br />Comment: to appear in Science
Details
- Database :
- arXiv
- Journal :
- Science 337, 821 (2012)
- Publication Type :
- Report
- Accession number :
- edsarx.1207.0915
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1126/science.1223532