Featureless quantum spin liquid, 1/3-magnetization plateau state, and exotic thermodynamic properties of the spin-1/2 frustrated Heisenberg antiferromagnet on an infinite Husimi lattice

被引:16
作者
Liu, Tao [1 ,2 ]
Ran, Shi-Ju [1 ,2 ]
Li, Wei [1 ,2 ,3 ,4 ]
Yan, Xin [1 ,2 ]
Zhao, Yang [1 ,2 ]
Su, Gang [1 ,2 ]
机构
[1] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[2] Univ Chinese Acad Sci, Computat Mat Phys Lab, Sch Phys, Beijing 100049, Peoples R China
[3] Univ Munich, Arnold Sommerfeld Ctr Theoret Phys, Phys Dept, D-80333 Munich, Germany
[4] Univ Munich, Ctr NanoSci, D-80333 Munich, Germany
来源
PHYSICAL REVIEW B | 2014年 / 89卷 / 05期
关键词
KAGOME-LATTICE; TRIANGULAR-LATTICE; WAVE-FUNCTIONS; ORDER; FIELD; MODEL;
D O I
10.1103/PhysRevB.89.054426
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
By utilizing tensor-network-based methods, we investigate the zero-and finite-temperature properties of the spin-1/2 Heisenberg antiferromagnetic (HAF) model on an infinite Husimi lattice that contains 3/2 sites per triangle. The ground state of this model is found to possess vanishing local magnetization and is featureless; the spin-spin and dimer-dimer correlation functions are verified to decay exponentially, and its ground-state energy per site is determined to be e(0) = -0.4343(1), which is very close to that [e(0) = -0.4386(5)] of the intriguing kagome HAF model. The magnetization curve shows the absence of a zero-magnetization plateau, implying a gapless excitation. A 1/3-magnetization plateau with spin-up-up-down state is observed, which is selected and stabilized 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 conclusion that the HAF model on the infinite Husimi lattice owns a gapless and featureless spin-liquid ground state.
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页数:7
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