Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-09-08
J. Phys.: Condens. Matter 21 456009 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 5 figures
Scientific paper
10.1088/0953-8984/21/45/456009
In this paper, we propose a novel quantum paramagnetic state in two-dimensional antiferromagnets: the spontaneously trimer state, which is constructed by the trimers of spins. Each trimer is a singlet state formed by three neighboring spins with SU(3) symmetry. A frustrated spin-1 Heisenberg model in the kagome lattice is investigated. By analogy to the pseudo-potential approach in the fractional quantum Hall effect (FQHE), we find that the trimer state provides a perfect description for the exact ground state of this model. Other interesting properties, such as the local excitations as well as magnetization plateaus have also been investigated. It is shown that this novel state would deepen our understanding of the nature of the many-body entanglement in the two-dimensional strong correlated systems.
Cai Zi
Chen Shu
Wang Yupeng
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