Zooming-in on the charge ordering in YBa2Cu3O6.5

D. L. Feng; A. Rusydi; P. Abbamonte; L. Venema; I. Elfimov; R. Liang; D. A. Bonn; W. N. Hardy; C. Schusler-Langeheine; S. Hulbert; C. -C. Kao; G. A. Sawatzky

arXiv · cond-mat/0402488

Zooming-in on the charge ordering in YBa2Cu3O6.5

D. L. Feng·A. Rusydi·P. Abbamonte·L. Venema·I. Elfimov·R. Liang·D. A. Bonn·W. N. Hardy·C. Schusler-Langeheine·S. Hulbert·C. -C. Kao·G. A. Sawatzky

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Abstract

We report direct evidence of charge/orbital ordering of low energy electronic states of $Cu$ in YBa$_2$Cu$_3$O$_{6+x}$ ortho-II phase in both the $CuO_3$ chain and the CuO$_2$ plane. Huge enhancement of the $({1/2},0,0)$ superstructure Bragg peak is observed when photon energy is tuned to the $Cu L_{2,3}$ absorption edge with large polarization dependence. The ordering in the $CuO_2$ plane discovered here sheds new light on how the one dimensional $Cu-O$ chains affect the $CuO_2$ plane, and why many normal and superconducting state properties of this system exhibit strong anisotropy.

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D. L. Feng, A. Rusydi, P. Abbamonte, L. Venema, I. Elfimov, R. Liang, D. A. Bonn, W. N. Hardy, C. Schusler-Langeheine, S. Hulbert, C. -C. Kao, G. A. Sawatzky. 2004-02-19. Zooming-in on the charge ordering in YBa2Cu3O6.5. https://arxiv.org/abs/cond-mat/0402488

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