Checkerboard-Like Charge Ordering in Underdoped Cuprates
P. Wróbel
Institute for Low Temperature and Structure Research, P.O. Box 1410, 50-950 Wrocław 2, Poland
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Received: 25 09 2005;
Recent scanning tunneling microscopy measurements which indicate the formation of two-dimensional density modulations at some doping levels in cuprates were reviewed. A model of hard-core bosons which represent bound hole pairs in the two-dimensional doped antiferromagnet was discussed in the context of these experimental results. By means of an exact numerical diagonalization it was shown that the Coulomb repulsion between bosons brings about the formation of charge modulations.
DOI: 10.12693/APhysPolA.109.533
PACS numbers: 74.20.Mn, 71.10.Fd