X-ray diffraction study of lattice modulations in an underdoped YBa2Cu3O6+x superconductor
Abstract
We report a temperature-dependent increase below ~220 K of diffuse superlattice peaks corresponding to q0=(~2/5,0,0) in an underdoped YBa2Cu3O6+x superconductor (x~0.63). These peaks reveal strong c-axis correlations involving the CuO2 bilayers, show a nonuniform increase below ~220 K with a plateau for ~100-160 K, and appear to saturate in the superconducting phase. We propose that this temperature dependence of the superlattice peaks is a possible manifestation of charge stripes in the CuO2 planes which are coupled to the oxygen-ordered superstructure.
- Publication:
-
Physical Review B
- Pub Date:
- September 2002
- DOI:
- 10.1103/PhysRevB.66.092501
- arXiv:
- arXiv:cond-mat/0110390
- Bibcode:
- 2002PhRvB..66i2501I
- Keywords:
-
- 74.72.Bk;
- 61.10.Eq;
- 74.25.-q;
- Y-based cuprates;
- X-ray scattering;
- Properties of type I and type II superconductors;
- Condensed Matter - Superconductivity
- E-Print:
- 4 pages, 4 figures