Quantum and classical criticalities in the frustrated two-leg Heisenberg ladder

Details Quantum and classical criticalities in the frustrated two-leg Heisenberg ladder Quantum and classical criticalities in the frustrated two-leg Heisenberg ladder

2007-08-21

arxiv.org/abs/0708.2926v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 4 figures, talk presented at the Theory Canada 3 conference in 2007, submitted to the Canadian Journal of Physics

Scientific paper

10.1139/P08-003

This talk was about the frustration-induced criticality in the antiferromagnetic Heisenberg model on the two-leg ladder with exchange interactions along the chains, rungs, and diagonals, and also about the effect of thermal fluctuations on this criticlity. The method used is the bond mean-field theory, which is based on the Jordan-Wigner transformation in dimensions higher than one. In this paper, we will summarize the main results presented in this talk, and report on new results about the couplings and temperature dependences of the spin susceptibility.

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