Tetragonal distortion yielding a two-singlet spin liquid in pyrochlore Tb2Ti2O7

被引：59

作者：

Bonville, Pierre ^{[1
]}

Mirebeau, Isabelle ^{[2
]}

Gukasov, Arsene ^{[2
]}

Petit, Sylvain ^{[2
]}

Robert, Julien ^{[2
]}

机构：

[1] CEA, Ctr Saclay, DSM, IRAMIS,Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

[2] CEA, Ctr Saclay, DSM, IRAMIS,Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 18期

关键词：

STATE;

D O I：

10.1103/PhysRevB.84.184409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pyrochlore compound Tb2Ti2O7 is known to remain in a spin-liquid state down to the lowest attainable temperature (0.05 K), whereas current theories predict it should order into an antiferromagnetic structure. A number of models have been developed in order to resolve this discrepancy, but none of them could obtain a spin-liquid ground state. We present here a tentative explanation for the lack of magnetic order in Tb2Ti2O7 based on the presence of a Jahn-Teller-like distortion from the local trigonal symmetry and on the physics of the two-singlet system coupled by exchange.

引用

页数：6

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