Plaquette order in a dimerized frustrated spin ladder

  title={Plaquette order in a dimerized frustrated spin ladder},
  author={Ofer Shlagman and Efrat Shimshoni},
  journal={Physical Review B},
We study the effect of spin-Peierls instability on the phase-diagram of a frustrated antiferromagnetic spin-1/2 ladder, with weak transverse and diagonal rung coupling. Our analysis focuses on a one-dimensional version of the model (i.e. a single two-leg ladder) where we consider two forms of spin-Peierls (SP) instabilities on the legs: columnar dimers (CD) and staggered dimers (SD). We particularly examine the regime of parameters (corresponding to an intermediate XXZ anisotropy) where the SP… 

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