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Susceptibility and Low Temperature Thermodynamics of Spin-1/2 Heisenberg Ladders

Beat Frischmuth·Beat Ammon·Matthias Troyer
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Abstract

The temperature dependence of the uniform susceptibility and the ground state energy of antiferromagnetic Heisenberg ladders with up to 6 legs has been calculated, using the Monte Carlo loop algorithm. The susceptibilities of even-leg-ladders show spin gaps while these of odd-leg-ladders remain finite in the zero temperature limit. For small ratios of intra- to inter-leg couplings, odd-leg-ladders can be mapped at low temperatures to single chains. For equal couplings, the logarithmic corrections at low temperatures increase markedly with the number of legs.

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Beat Frischmuth, Beat Ammon, Matthias Troyer. 1996-01-08. Susceptibility and Low Temperature Thermodynamics of Spin-1/2 Heisenberg Ladders. https://doi.org/10.1103/physrevb.54.r3714

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