Quasi-1D dynamics and nematic phases in the 2D Emery model

Details Quasi-1D dynamics and nematic phases in the 2D Emery model Quasi-1D dynamics and nematic phases in the 2D Emery model

2003-02-09

arxiv.org/abs/cond-mat/0302163v4

Phys. Rev. B 69, 144505 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 5 eps figures; revised manuscript with more detailed discussions; two new figures and three edited figuresedited figu

Scientific paper

10.1103/PhysRevB.69.144505

We consider the Emery model of a Cu-O plane of the high temperature superconductors. We show that in a strong-coupling limit, with strong Coulomb repulsions between electrons on nearest-neighbor O sites, the electron-dynamics is strictly one dimensional, and consequently a number of asymptotically exact results can be obtained concerning the electronic structure. In particular, we show that a nematic phase, which spontaneously breaks the point- group symmetry of the square lattice, is stable at low enough temperatures and strong enough coupling.

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