26-03E
26-03E
Thermodynamics of the spin-S Heisenberg antiferromagnet on the kagome lattice: Finite-size numerics and high-temperature series expansion
We examine thermodynamic quantities for the kagome-lattice Heisenberg antiferromagnet with spin S>1/2. To this end, we use exact diagonalization and finite-temperature Lanczos method data for finite systems as well as high-temperature series expansion up to order 11 in β=1/T and the entropy method. We focus on the temperature profiles of entropy, specific heat, and susceptibility. In particular, we discuss how the temperature dependence of the specific heat c(T) varies as the spin quantum number S grows to the classical limit S→∞.