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Title: Hole pairing in antiferro magnetically correlated layered oxides
Authors: Kumar, N.
Issue Date: 1988
Publisher: Elsevier B.V.
Citation: Physica C, 1988, Vol. 153, p1227
Abstract: We have considered a two-band Hubbard model having interlaced Cu-3d(x2−y2) and O-2p(x, y) orbitals representing the CuO2 square planes. Simple CuO2 -cluster calculation suggests that the additional holes created by doping stay mainly on oxygen. Motion of an oxygen hole interlacing with the antiferromagnetically correlated background of copper spins, creates a string of high energy spin configuration of finite length giving mass renormalization. Another hole of opposite spin can now anneal this string tension providing a triangular pairing potential for large pair momentum. The latter implies unusual Bose condensation of the wake-bound compact Bose-like pairs on a non-zero momentum shell. Effect of disorder favouring condensation at the mobility edge is pointed out.
Description: Restricted Access
ISSN: 0921-4534
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Copyright: 1988 Elsevier B.V.
Appears in Collections:Research Papers (TP)

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