Search for quantum dimer phases and transitions in a frustrated spin ladder

Details Search for quantum dimer phases and transitions in a frustrated spin ladder Search for quantum dimer phases and transitions in a frustrated spin ladder

2006-05-30

arxiv.org/abs/cond-mat/0605719v1

Phys. Rev. B 73, 224433 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures. To be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.73.224433

A two-leg spin-1/2 ladder with diagonal interactions is investigated numerically. We focus our attention on the possibility of columnar dimer phase, which was recently predicted based on a reformulated bosonization theory. By using density matrix renormalization group technique and exact diagonalization method, we calculate columnar dimer order parameter, spin correlation on a rung, string order parameters, and scaled excitation gaps. Carefully using various finite-size scaling techniques, our results show no support for the existence of columnar dimer phase in the spin ladder under consideration.

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