期刊
PHYSICAL REVIEW B
卷 90, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.195148
关键词
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资金
- Perimeter Institute
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Economic Development and Innovation
- Max-Planck-Institut
Quantum dimer models typically arise in various low energy theories like those of frustrated antiferromagnets. We introduce a quantum dimer model on the kagome lattice which stabilizes an alternative Z(2) topological order, namely the so-called double semion order. For a particular set of parameters, the model is exactly solvable, allowing us to access the ground state as well as the excited states. We show that the double semion phase is stable over a wide range of parameters using numerical exact diagonalization. Furthermore, we propose a simple microscopic spin Hamiltonian forwhich the low-energy physics is described by the derived quantum dimer model.
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