Imaging bond order near non-magnetic impurities in square lattice antiferromagnets
arXiv:0808.0495 · doi:10.1103/PhysRevLett.101.187206
Abstract
We study the textures of generalized "charge densities" (scalar objects invariant under time reversal), in the vicinity of non-magnetic impurities in square-lattice quantum anti-ferromagnets, by order parameter field theories. Our central finding is the structure of the "vortex" in the generalized density wave order parameter centered at the non-magnetic impurity. Using exact numerical data from quantum Monte Carlo simulations on an antiferromagnetic spin model, we are able to verify the results of our field theoretic study. We extend our phenomenological approach to the period-4 bond-centered density wave found in the underdoped cuprates.
4 pages, 4 figures
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- Supersolid phases of a doped valence-bond quantum antiferromagnet: Evidence for a coexisting superconducting order parameter
- Revealing the degree of magnetic frustration by non-magnetic impurities
- Magnetic effects of non-magnetic impurities in gapped short-range resonating valence bond spin liquids
- Effects of edge disorder in nano-scale antiferromagnetic clusters
- Many-body calculation of the spatial extent of the wave-function of a non-magnetic impurity in a d-wave high-temperature superconductor using the t--J model