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Charge Stripe in an Antiferromagnet: 1d Band of Composite Excitations
A. L. Chernyshev, Steven R. White, A. H. Castro Neto
With the help of analytical and numerical studies of the - model we argue that the charge stripe in an antiferromagnetic insulator should be understood as a system of holon…
Friedel Oscillations and Charge Density Waves in Chains and Ladders
Steven R. White, Ian Affleck, Douglas J. Scalapino
The density matrix renormalization group method for ladders works much more efficiently with open boundary conditions. One consequence of these boundary conditions is groundstate c…
Li Induced Spin and Charge Excitations in a Spin Ladder
Andreas Laeuchli, Didier Poilblanc, T. M. Rice +1
A lithium dopant in a cuprate spin ladder acts as a vacant (non-magnetic) site accompanied by an extra hole bound by a Coulomb potential. We find that, although the undoped ladder…
Stripe orientation in an anisotropic t-J model
Arno P. Kampf, Douglas J. Scalapino, Steven R. White
The tilt pattern of the CuO_6 octahedra in the LTT phase of the cuprate superconductors leads to planar anisotropies for the exchange coupling and hopping integrals. Here, we show…