One-dimensional Heisenberg antiferromagnet in which two S=1/2 and two S=1 spins are arranged alternatively
classification
❄️ cond-mat.str-el
cond-mat.stat-mech
keywords
alternativelyantiferromagnetarrangedheisenbergone-dimensionalspinsaccompaniesanalytical
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Ground-state and thermodynamic properties of the one-dimensional Heisenberg antiferromagnet in which two S=1/2 and two S=1 spins are arranged alternatively are studied by a quantum Monte Carlo method and by analytical estimates. It is found that the ground state of the system undergoes a second-order phase transition which accompanies the vanishing of the energy gap.
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