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

页数：10

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