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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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