Technical Comments

Comment on “Broken translational and rotational symmetry via charge stripe order in underdoped YBa2Cu3O6+y

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Science  15 Jan 2016:
Vol. 351, Issue 6270, pp. 235
DOI: 10.1126/science.aac4454

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Comin et al. (Reports, 20 March 2015, p. 1335) have interpreted their resonant x-ray scattering experiment as indicating that charge inhomogeneities in the family of high-temperature superconductors YBa2Cu3O6+y (YBCO) have the character of one-dimensional stripes rather than two-dimensional checkerboards. The present Comment shows that one cannot distinguish between stripes and checkerboards on the basis of the above experiment.

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