Lee Sung-Sik, Lee Patrick A
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Phys Rev Lett. 2005 Jul 15;95(3):036403. doi: 10.1103/PhysRevLett.95.036403.
We formulate a U(1) gauge theory of the Hubbard model in the slave-rotor representation. From this formalism it is argued that spin liquid phases may exist near the Mott transition in the Hubbard model on triangular and honeycomb lattices at half filling. The organic compound kappa-(BEDT-TTF)2Cu2(CN)3 is a good candidate for the spin liquid state on a triangular lattice. We predict a highly unusual temperature dependence for the thermal conductivity of this material.
我们在从转子表示中构建了哈伯德模型的U(1)规范理论。从这种形式主义出发，可以认为在半填充的三角形和蜂窝晶格上的哈伯德模型中，莫特转变附近可能存在自旋液体相。有机化合物κ-(BEDT-TTF)2Cu2(CN)3是三角形晶格上自旋液体态的良好候选物。我们预测了这种材料热导率的一种非常不寻常的温度依赖性。
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