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

Pierre Bonville, Isabelle Mirebeau, Arsène Gukasov, Sylvain Petit, and Julien Robert
Phys. Rev. B 84, 184409 – Published 10 November 2011

Abstract

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.

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  • Received 17 May 2011

DOI:https://doi.org/10.1103/PhysRevB.84.184409

©2011 American Physical Society

Authors & Affiliations

Pierre Bonville

  • CEA, Centre de Saclay, DSM/IRAMIS/Service de Physique de l'Etat Condensé, F-91191 Gif-sur-Yvette, France

Isabelle Mirebeau*, Arsène Gukasov, Sylvain Petit, and Julien Robert

  • CEA, Centre de Saclay, DSM/IRAMIS/Laboratoire Léon Brillouin, F-91191 Gif-sur-Yvette, France

  • *isabelle.mirebeau@cea.fr

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Issue

Vol. 84, Iss. 18 — 1 November 2011

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