Phase diagram of ferrimagnetic ladders with bond-alternation

Abstract

We study the phase diagram of a 2-leg bond-alternation spin-(1/2, 1) ladder for two different configurations using a quantum renormalization group approach. Although d-dimensional ferrimagnets show gapless behavior, we will explicitly show that the effect of the spin mixing and the bond-alternation can open the possibility for observing an energy gap. We show that the gapless phases of such systems can be equivalent to the 1-dimensional half-integer antiferroamgnets, besides the gapless ferrimagnetic phases. We therefore propose a phase transition between these two gapless phases that can be seen in the parameter space.

5 pages and 3 ps figures, accepted in Phys. Rev. B

References in corpus (3)

• Magnetization Plateaux in N-Leg Spin Ladders
• Phase diagram of the anti-ferromagnetic xxz model in the presence of an external magnetic field
• Mixed-Spin Ladders and Plaquette Spin Chains

Cited by in corpus (12)

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• Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux
• Collective excitations in ferrimagnetic Heisenberg ladders
• Low Energy Properties of Ferrimagnetic 2-leg Ladders: a Lanczos study
• Cumulant expansion for ferrimagnetic spin (S_1, s_2) systems
• Enhanced magnetocaloric effect in a mixed spin-(1/2, 1) Ising-Heisenberg two-leg ladder with strong-rung interaction
• Phase diagram of the XXZ ferrimagnetic spin-(1/2, 1) chain in the presence of transverse magnetic field
• Low-Temperature Properties of Quasi-One-Dimensional Molecule-Based Ferromagnets
• Re-Entrant Quantum Phase Transitions in Antiferromagnetic Spin-1 Ladders
• Phase diagram of frustrated mixed-spin ladders in the strong-coupling limit