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Quadrupole Order in the Frustrated Pyrochlore Tb_{2+x}Ti_{2-x}O_{7+y}.
Takatsu, H; Onoda, S; Kittaka, S; Kasahara, A; Kono, Y; Sakakibara, T; Kato, Y; Fåk, B; Ollivier, J; Lynn, J W; Taniguchi, T; Wakita, M; Kadowaki, H.
Afiliação
  • Takatsu H; Department of Physics, Tokyo Metropolitan University, Hachioji-shi, Tokyo 192-0397, Japan.
  • Onoda S; Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
  • Kittaka S; RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.
  • Kasahara A; Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan.
  • Kono Y; Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan.
  • Sakakibara T; Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan.
  • Kato Y; Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan.
  • Fåk B; Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan.
  • Ollivier J; RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.
  • Lynn JW; Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan.
  • Taniguchi T; Institute Laue Langevin, BP 156, F-38042 Grenoble, France.
  • Wakita M; Institute Laue Langevin, BP 156, F-38042 Grenoble, France.
  • Kadowaki H; NCNR, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA.
Phys Rev Lett ; 116(21): 217201, 2016 May 27.
Article em En | MEDLINE | ID: mdl-27284670
ABSTRACT
A hidden order that emerges in the frustrated pyrochlore Tb_{2+x}Ti_{2-x}O_{7+y} with T_{c}=0.53 K is studied using specific heat, magnetization, and neutron scattering experiments on a high-quality single crystal. Semiquantitative analyses based on a pseudospin-1/2 Hamiltonian for ionic non-Kramers magnetic doublets demonstrate that it is an ordered state of electric quadrupole moments. The elusive spin liquid state of the nominal Tb_{2}Ti_{2}O_{7} is most likely a U(1) quantum spin-liquid state.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article