Imaging bond order near non-magnetic impurities in square lattice antiferromagnets

Details Imaging bond order near non-magnetic impurities in square lattice antiferromagnets Imaging bond order near non-magnetic impurities in square lattice antiferromagnets

2008-08-05

arxiv.org/abs/0808.0495v1

Physical Review Letters 101, 187206 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.187206

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.

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