Physics – Condensed Matter – Superconductivity
Scientific paper
2010-10-26
Physical Review B 84, 060513(R) (2011)
Physics
Condensed Matter
Superconductivity
6 pages, 4 figures
Scientific paper
We study the electronic structure of Ca2-xNaxCuO2Cl2 and Bi2Sr2CaCu2O8+d samples in a wide range of doping, using angle-resolved photoemission spectroscopy, with emphasis on on the Fermi surface (FS) in the near anti-nodal region. The "nesting wave vector", i.e., the wave vector that connects two nearly flat pieces of the Fermi surface in the anti-nodal region, reveals a universal monotonic decrease in magnitude as a function of doping. Comparing our results to the charge order recently observed by scanning tunneling spectroscopy (STS), we conclude that the FS nesting and the charge order pattern seen in STS do not have a direct relationship. Therefore,the charge order likely arises due to strong correlation physics rather than FS nesting physics.
Brunner Matthias
Gu G.-D.
Gweon G.-H.
Kim Kyung Hyuk
Lee Ho-Gyu
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