Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder

Details Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder Low-Temperature Properties of the Randomly Depleted Heisenberg Ladder

1996-06-24

arxiv.org/abs/cond-mat/9606170v1

J. Phys. Soc. Jpn. 65 (1996) 2385

Physics

Condensed Matter

LaTex, 4 pages, 2 Postscript figures, epsf.sty and jpsj.sty, to be published in J. Phys. Soc. Jpn. (August issue)

Scientific paper

10.1143/JPSJ.65.2385

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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