Thermodynamic Properties of Spin Ladders with Cyclic Exchange
arXiv:cond-mat/0210669 · doi:10.1103/PhysRevB.67.134428
Abstract
By high temperature series expansion and exact complete diagonalization the magnetic susceptibility chi(T) and the specific heat C(T) of a two-leg S=1/2 ladder with cyclic (4-spin) exchange are computed. Both methods yield convincing results for not too small temperatures. We find that a small amount of cyclic exchange influences the thermodynamical properties significantly. Our results can serve as reliable basis for an efficient analysis of experimental data
6 pages, 7 figures
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