Magnetic and Critical Properties of Alternating Spin Chain with S=1/2,1 in Magnetic Fields

Abstract

We study an integrable spin chain with an alternating array of spins S=1/2, 1 in external magnetic fields using the Bethe ansatz exact solution. The calculated magnetization possesses a cusp structure at a critical magnetic field H=H_{C}, at which the specific heat shows a divergence property. We also calculate finite-size corrections to the energy spectrum, and obtain the critical exponents of correlation functions with the use of conformal field theory (CFT). Low-energy properties of the model are described by two c=1 U(1) CFTs in H<H_{C} and one c=1 U(1) CFT in H>H_{C}.

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References in corpus (3)

• NMR relaxation in half-integer antiferromagnetic spin chains
• Thermodynamics of Integrable Chains with Alternating Spins
• Critical Behaviour of integrable mixed spins chains

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• Combination of Ferromagnetic and Antiferromagnetic Features in Heisenberg Ferrimagnets
• Magnetic and Critical Properties of Alternating Spin Heisenberg Chain in a Magnetic Field
• Mixed Heisenberg Chains. I. The Ground State Problem
• Alternating spin chains with singlet ground states
• Ground-State and Thermodynamic Properties of the Quantum Mixed Spin-1/2-1/2-1-1 Chain
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• Alternating-Spin Ladders
• N-leg integer-spin ladders and tubes in commensurate external fields -Nonlinear sigma model approach-
• Residual Entropy and Spin Fractionalizations in the Mixed-Spin Kitaev Model
• Thermodynamics of antiferromagnetic alternating spin chains
• Magnetization cusp singularities of frustrated Kondo necklace model
• Impact of Stealthy Hyperuniform Magnetic Impurity Configurations on Bulk Magnetism in a Two-dimensional Heisenberg Model