Staggered dimer order in S=1/2 quantum spin ladder system with four spin exchange

Abstract

We study the S=1/2 quantum spin ladder system with the four-spin exchange, using density matrix renormalization group method and an exact diagonalization method. Recently, the phase transition in this system and its universality class are studied. But there remain controversies whether the phase transition is second order type or the other type and the nature of order parameter. There are arguments that the massless phase appears. But this does not agree with our previous result. Analyzing DMRG data, we try a new approach in order to determine a phase which appears after the phase transition. We find that the edge state appears in the open boundary condition, investigating excitation energies of states with higher magnetizations.

Submitted to Phys. Rev. B, (REVTeX4)

References in corpus (4)

• Perturbation theories for the S=1/2 spin ladder with four-spin ring exchange
• String order in spin liquid phases of spin ladders
• Rung-singlet phase of the S=1/2 two-leg spin-ladder with four-spin cyclic exchange
• Thermodynamic Properties of Spin Ladders with Cyclic Exchange

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• Melting of a frustration-induced dimer crystal and incommensurability in the J_1-J_2 two-leg ladder
• Quantum phase transitions in multileg spin ladders with ring exchange
• Phase Diagram of the Heisenberg Spin Ladder with Ring Exchange
• Competing Orders and Hidden Duality Symmetries in Two-leg Spin Ladder Systems
• Edge states of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
• Continuous phase transition between Neel and valence bond solid phases in a J-Q-like spin ladder system
• Semiclassical Approach to Competing Orders in Two-leg Spin Ladder with Ring-Exchange
• Statistical mechanics of dimers on quasiperiodic Ammann-Beenker tilings
• Doped two-leg ladder with ring exchange
• Symmetry-protected topological phases and competing orders in a spin-1/2 XXZ ladder with a four-spin interaction
• Dynamics in two-leg spin ladder with a four-spin cyclic interaction
• Symmetry, topology, duality, chirality, and criticality in a spin-1/2 XXZ ladder with a four-spin interaction
• Phase diagram of a spin-1/2 Heisenberg ladder with a chirality-chirality interaction