On the Charge Ordering Observed by Recent STM Experiments
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We present a perspective on the recent discoveries of possible charge ordering in underdoped Bi_2Sr_2CaCu_2O_{8+δ} and Na_xCa_{2-x}CuO_2Cl_2 by high-resolution scanning tunnelling spectroscopy.
4 pages, 4 figures; Version 2 changes: 1) Abstract revised. 2) Introduction expanded to discuss additional relevant experiments. 3) Discussion added to clarify relation between condensed (hole crystal) and uncondensed charge order states. 4) Figures 1,2,3 combined to 2 figures. 5) Figure 4 revised to correct error (qualitatively unchanged). 6) References added
4 pages, 4 figures; Version 2 changes: 1) Abstract revised. 2) Introduction expanded to discuss additional relevant experiments. 3) Discussion added to clarify relation between condensed (hole crystal) and uncondensed charge order states. 4) Figures 1,2,3 combined to 2 figures. 5) Figure 4 revised to correct error (qualitatively unchanged). 6) References added