Featureless quantum spin liquid, 1 3-magnetization plateau state, and exotic thermodynamic propertie

• 作 者: TaoLiu[1]Shi-JuRan[1]WeiLi[2]XinYan[1]YangZhao[1]GangSu[1]
• 机 构: Theoretical Condensed Matter Physics and Computational Materials Physics Laboratory, School of Physi
• 出 处: 第十三届国际凝聚态理论与计算材料学会议(The 13th International Conference on Con
• 发表日期: 2014年期

　　By utilizing tensor-network-based methods, we investigate the zero-and finite-temperature properties of thespin-1/2 Heisenberg antiferromagnetic (HAF) model on an infinite Husimi lattice that contains 3 /2 sites pertriangle.The ground state of this model is found to possess vanishing local magnetization and is featureless;thespin-spin and dimer-dimer correlation functions are verified to decay exponentially, and its ground-state energyper site is determined to be e0 =-0.4343(1), which is very close to that [e0 =-0.4386(5)] of the intriguingkagome HAF model.The magnetization curve shows the absence of a zero-magnetization plateau, implying agapless excitation.A 1/3-magnetization plateau with spin-up-up-down state is observed, which is selected andstabilized by quantum fluctuations.A ground-state phase diagram under magnetic fields is presented.Moreover, both magnetic susceptibility and the specific heat are studied, whose low-temperature behaviors reinforce the con-clusion that the HAF model on the infinite Husimi lattice owns a gapless and featureless spin-liquid ground state.