Projected-wave-function study of the spin-1/2 Heisenberg model on the kagome lattice

被引：503

作者：

Ran, Ying ^{[1
]}

Hermele, Michael ^{[1
]}

Lee, Patrick A. ^{[1
]}

Wen, Xiao-Gang ^{[1
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.98.117205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform a Gutzwiller projected-wave-function study for the spin-1/2 Heisenberg model on the Kagome 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 ZnCu3(OH)(6)Cl-2.

引用

页数：4

共 16 条

[1] From the triangular to the kagome lattice: Following the footprints of the ordered state [J].