Anisotropic frustrated Heisenberg model on the honeycomb lattice

被引：10
|
作者：
Kalz, Ansgar [1 ]
Arlego, Marcelo [2 ,3 ]
Cabra, Daniel [2 ,3 ]
Honecker, Andreas [1 ,4 ]
Rossini, Gerardo [2 ,3 ]
机构：
[1] Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany
[2] Univ Nacl La Plata, Inst Fis La Plata, RA-1900 La Plata, Buenos Aires, Argentina
[3] Univ Nacl La Plata, Dept Fis, RA-1900 La Plata, Buenos Aires, Argentina
[4] Univ Gottingen, Fak Math & Informat, D-37073 Gottingen, Germany
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 10期
关键词：
OPEN-SOURCE SOFTWARE; QUANTUM; SIMULATION; MAGNETISM;
D O I：
10.1103/PhysRevB.85.104505
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the ground-state phase diagram of an anisotropic Heisenberg model on the honeycomb lattice with competing interactions. We use quantum Monte Carlo simulations, as well as linear spin-wave and Ising series expansions, to determine the phase boundaries of the ordered magnetic phases. We find a region without any classical order in the vicinity of a highly frustrated point. Higher-order correlation functions in this region give no signal for long-range valence-bond order. The low-energy spectrum is derived via exact diagonalization to check for topological order on small-size periodic lattices.
引用
收藏
页数：10
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