Phys. Rev. Lett. 82, 1764–1767 (1999)Finite Temperature Drude Weight of the One-Dimensional Spin- 1/2 Heisenberg ModelReceived 21 August 1998; published in the issue dated 22 February 1999 Using the Bethe ansatz method, the zero frequency contribution (Drude weight) to the spin current correlations is analyzed for the easy plane antiferromagnetic Heisenberg model. The Drude weight is a monotonically decreasing function of temperature for all 0≤Δ≤1; it approaches the zero temperature value with a power law and appears to vanish for all finite temperatures at the isotropic Δ = 1 point. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.1764
DOI:
10.1103/PhysRevLett.82.1764
PACS:
75.10.Jm, 05.30.-d, 75.40.Gb
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