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Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder

M. Sigrist·A. Furusaki
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Abstract

Low-temperature thermodynamic properties of the spin-1/2 Heisenberg ladder system with non-magnetic impurities are discussed using an effective Hamiltonian for the impurity-induced spins in the background of a spin liquid with a gap. It is shown that the uniform susceptibility shows Curie-like behavior in high-, intermediate-, and low-temperature regimes, with three different Curie constants. The ratio of specific heat to temperature, C/T, is divergent in the low-temperature limit, reflecting a singular distribution of the effective couplings among the impurity spins.

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M. Sigrist, A. Furusaki. 1996-06-24. Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder. https://doi.org/10.1143/jpsj.65.2385

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