Charge ordering in NaCCOC

In studying high temperature superconductors, what can be explained by a textbook Fermi liquid theory and what cannot be is a central question. This is generally easier said than done, because an exotic theory can look like a textbook theory when low energy excitations are examined. So, the correct question to ask is whether the *exotic strong correlation* physics is first or the textbook *Fermi liquid* physics is first.

In addressing this question, the so-calle Na-oxychloride superconductors (NaCCOC) are valuable. Here in this work, we studied these rarely obtainable high quality crystals at UCSC. The data taken at UCSC definitely indicate that the *exotic strong correlation physics* is the primary physics to be considered first. This conclusion is drawn by carefully stuyding the Fermi surface geometry and correlating it with the known charge ordering wave vectors for NaCCOC.

Extension to other cuprates

We could also extend our analysis to Bi2212 superconductors, for which we obtained the data at the UCSC, and Bi2201 superconductors. In both cases, we could draw the same conclusion as above.

Links

• The paper can be accessed from here or here (public).

• This work was presented as part of my invited talk at the March meeting 2012: abstract and presentation.