Hidden long-range order in kagome Heisenberg antiferromagnets

Article

关键词: SPIN-LIQUID;    LATTICE;    STATES;    DISORDER;    PEIERLS;   

DOI  :  10.1103/PhysRevB.66.132408

来源: SCIE

【 摘 要 】

We give a physical picture of the low-energy sector of the spin-1/2 kagome Heisenberg antiferromagnet (KAF). It is shown that the kagome lattice can be presented as a set of stars which contain 12 spins and are arranged in a triangular lattice. Each of these stars has two degenerate singlet ground states which can be considered in terms of pseudospin. As a result of the interaction between stars we get the Hamiltonian of the Ising ferromagnet in a magnetic field. So in contrast to the common view there is a long-range order in KAF consisting of definite singlet states of stars.

【 授权许可】

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