Thermodynamics of Random Ferromagnetic Antiferromagnetic Spin-1/2 Chains

Details Thermodynamics of Random Ferromagnetic Antiferromagnetic Spin-1/2 Chains Thermodynamics of Random Ferromagnetic Antiferromagnetic Spin-1/2 Chains

1998-08-03

arxiv.org/abs/cond-mat/9808027v1

Phys. Rev. B 60, 003388 (1999)

Physics

Condensed Matter

13 pages, 13 figures, RevTeX

Scientific paper

10.1103/PhysRevB.60.3388

Using the quantum Monte Carlo Loop algorithm, we calculate the temperature dependence of the uniform susceptibility, the specific heat, the correlation length, the generalized staggered susceptibility and magnetization of a spin-1/2 chain with random antiferromagnetic and ferromagnetic couplings, down to very low temperatures. Our data show a consistent scaling behavior in all the quantities and support strongly the conjecture drawn from the approximate real-space renormalization group treatment.A statistical analysis scheme is developed which will be useful for the search of scaling behavior in numerical and experimental data of random spin chains.

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