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Thermodynamics of strongly disordered spin ladders

Eddy Yusuf·Kun Yang
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Abstract

We study antiferromagnetic two-leg spin-1/2 ladders with strong bond randomness, using the real space renormalization group method. We find the low-temperature spin susceptibility of the system follows non-universal power laws, and the ground state spin-spin correlation is short-ranged. Our results suggest that there is no phase transition when the bond randomness increases from zero; for strong enough randomness the system is in a Griffith region with divergent spin susceptibility and short-range spin-spin correlation.

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Eddy Yusuf, Kun Yang. 2002-06-24. Thermodynamics of strongly disordered spin ladders. https://doi.org/10.1103/physrevb.65.224428

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