2012

The phase diagram of the anisotropic spin-2 XXZ model: an infinite system DMRG study

Kjäll, Jonas A., Zaletel, Michael P., Mong, Roger S. K. et al.

Understand

We study the ground state phase diagram of the quantum spin-2 XXZ chain in the presence of on-site anisotropy using a matrix-product state based infinite system density-matrix-renormalization-group (iDMRG) algorithm.

  • One of the interests in this system is in connecting the highly quantum mechanical spin-1 phase diagram with the classical S=infinity phase diagram.
  • Several of the recent advances within DMRG make it possible to perform a detailed analysis of the whole phase diagram.
  • We consider different types of on-site anisotropies which allows us to establish the validity of the following statements: One, the spin-2 model can be tuned into a phase which is equivalent to the "topologically nontrivial" spin-1 Haldane phase.

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