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Spin-1/2 Heisenberg antiferromagnet on the<i>kagome</i>´ lattice: High-temperature expansion and exact-diagonalization studies
For the spin-$\frac{1}{2}$ Heisenberg antiferromagnet on the Kagom\'e lattice we calculate the high temperature series for the specific heat and the structure factor. A comparison of the series with exact diagonalisation studies shows that the specific heat has further structure at lower temperature in addition to a high temperature peak …