Populated Domain Walls

Details Populated Domain Walls Populated Domain Walls

1996-09-10

arxiv.org/abs/cond-mat/9609094v2

Physics

Condensed Matter

Minor Corrections, References added, Phyzzx, 10 pgs

Scientific paper

10.1103/PhysRevLett.78.2465

Several experiments suggest that the charge carriers in the normal state of certain cuprate superconductors reside on domain walls. In an earlier paper, we suggested that several aspects of the anomalous dynamical behavior of these materials could be explained, at least qualitatively, on this basis. Here, using results on the ground state energy of the 1-dimensional Hubbard model (soluble by Bethe ansatz techniques) as a function of charge density, we argue that a non-zero charge density localized to domain walls is a very plausible consequence of strong short-range electron-electron repulsion. We also suggest a method to suppress meandering of the walls, and thereby enhance their signature in neutron diffraction.

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