Coupled frustrated quantum spin-1/2 chains with orbital order in volborthite Cu3V2O7(OH)2•2H2O

被引：39

作者：

Janson, O. ^{[1
]}

Richter, J. ^{[2
]}

Sindzingre, P. ^{[3
]}

Rosner, H. ^{[1
]}

机构：

[1] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[2] Univ Magdeburg, Inst Theoret Phys, D-39016 Magdeburg, Germany

[3] Univ Paris 06, Lab Phys Theor Mat Condensee, Paris, France

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 10期

关键词：

MAGNETIC MONOPOLES; LATTICE;

D O I：

10.1103/PhysRevB.82.104434

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a microscopic magnetic model for the spin-liquid candidate volborthite Cu3V2O7 (OH)(2)center dot 2H(2)O. The essentials of this density-functional-theory-based model are (i) the orbital ordering of Cu(1) 3d(3z2-r2) and Cu (2) 3d(x2-y2), (ii) three relevant couplings J(ic), J(1), and J(2), (iii) the ferromagnetic nature of J(1), and (iv) frustration governed by the next-nearest-neighbor exchange interaction J(2). Our model implies magnetism of frustrated coupled chains in contrast to the previously proposed anisotropic kagome model. Exact diagonalization studies reveal agreement with experiments.

引用

页数：5

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