Structural distortion and the spin liquid state in Tb2Ti2O7

被引：94

作者：

Curnoe, S. H. ^{[1
]}

机构：

[1] Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St John, NF A1B 3X7, Canada

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevB.78.094418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is shown that a (k) over right arrow = 0, A(2u) distortion of the terbium tetrahedral network in Tb2Ti2O7 causes the apparent isolation of single tetrahedra as seen in neutron scattering studies. Single tetrahedron collective spin states, rather than individual spins, account for the main features of the spin liquid state, namely, fluctuating local moments and the absence of long range order. Singlet and doublet collective spin ground states are considered. An effective interaction between tetrahedra on the fcc lattice is derived and found to be weak and anisotropic.

引用

页数：5

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