Projected-wave-function study of the spin-1/2 Heisenberg model on the Kagomé lattice.
Projected-wave-function study of the spin-1/2 Heisenberg model on the Kagomé lattice.
复制标题
DOI：
10.1103/physrevlett.98.117205
复制
发表时间：
2006-11
影响因子：
8.6
通讯作者：
Ying Ran;M. Hermele;P. Lee;X. Wen
中科院分区：
文献类型：
--
作者：
Ying Ran;M. Hermele;P. Lee;X. Wen
We perform a Gutzwiller projected-wave-function study for the spin-1/2 Heisenberg model on the Kagomé lattice to compare energies of several spin-liquid states. The result indicates that a U(1)-Dirac spin-liquid state has the lowest energy. Furthermore, even without variational parameters, the energy turns out to be very close to that found by exact diagonalization. We show that such a U(1)-Dirac state represents a quantum phase whose low-energy physics is governed by four flavors of two-component Dirac fermions coupled to a U(1) gauge field. These results are discussed in the context of recent experiments on ZnCu(3)(OH)(6)Cl(2).
