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A mean field theory for the spin ladder system | Xi Dai
; Zhao-bin Su
; | Date: |
18 Sep 1997 | Subject: | Strongly Correlated Electrons; Statistical Mechanics | cond-mat.str-el cond-mat.stat-mech | Abstract: | In the present paper, we propose a mean field approach for spin ladders based upon the Jordan-Wigner transformation along an elaborately ordered path. We show on the mean field level that ladders with even number legs open a energy gap in their low energy excitation with a magnitude close to the corresponding experimental values, whereas the low energy excitation of the odd-number-leg ladders are gapless. It supports the validity of our approach. We then calculate the gap size and the excitation spectra of 2-leg-ladder system. Our result is in good agreement with both the experimental data and the numerical results. | Source: | arXiv, cond-mat/9709199 | Services: | Forum | Review | PDF | Favorites |
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