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Tetragonal distortion yielding a two-singlet spin liquid in pyrochlore Tb 2 Ti 2 O 7

Tetragonal distortion yielding a two-singlet spin liquid in pyrochlore Tb 2 Ti 2 O 7 The pyrochlore compound Tb 2 Ti 2 O 7 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 Tb 2 Ti 2 O 7 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Tetragonal distortion yielding a two-singlet spin liquid in pyrochlore Tb 2 Ti 2 O 7

Bonville, Pierre
Physical Review B , Volume 84 (18) – Nov 1, 2011
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Publisher
American Physical Society (APS)
Copyright
Copyright © 2011 The American Physical Society
ISSN
1098-0121
eISSN
1550-235X
DOI
10.1103/PhysRevB.84.184409
Publisher site
See Article on Publisher Site

Abstract

The pyrochlore compound Tb 2 Ti 2 O 7 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 Tb 2 Ti 2 O 7 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.

Journal

Physical Review B – American Physical Society (APS)

Published: Nov 1, 2011

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