Quantizing Charged Magnetic Domain Walls: Strings on a Lattice

Details Quantizing Charged Magnetic Domain Walls: Strings on a Lattice Quantizing Charged Magnetic Domain Walls: Strings on a Lattice

1995-10-23

arxiv.org/abs/cond-mat/9510129v1

Physics

Condensed Matter

4 two-column pages, including the 3 Postscript figures

Scientific paper

10.1103/PhysRevB.54.R724

The discovery by Tranquada et al. of an ordered phase of charged domain walls in the high-Tc cuprates leads us to consider the possible existence of a quantum domain-wall liquid. We propose minimal models for the quantization, by meandering fluctuations, of isolated charged domain walls. These correspond to lattice string models. The simplest model of this kind, a directed lattice string, can be mapped onto a quantum spin chain or on a classical two-dimensional solid-on-solid surface model. The model exhibits a rich phase diagram, containing several rough phases with low-lying excitations as well as ordered phases which are gapped.

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