High Field behavior of the Spin Gap compound Sr$_2$Cu(BO$_3$)$_2$

Suchitra E. Sebastian; D. Yin; P. Tanedo; G. A. Jorge; N. Harrison; M. Jaime; Y. Mozharivskyj; G. Miller; J. Krzystek; S. A. Zvyagin; I. R. Fisher

doi:10.1103/PhysRevB.71.212405

High Field behavior of the Spin Gap compound Sr$_2$Cu(BO$_3$)$_2$

Strongly Correlated Electrons 2011-12-08 v3

Authors: Suchitra E. Sebastian , D. Yin , P. Tanedo , G. A. Jorge , N. Harrison , M. Jaime , Y. Mozharivskyj , G. Miller , J. Krzystek , S. A. Zvyagin , I. R. Fisher

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Abstract

We report magnetization and heat capacity measurements of single crystal samples of the spin gap compound Sr $_2$ Cu(BO $_3$ ) $_2$ . Low-field data show that the material has a singlet ground state comprising dimers with intradimer coupling J = 100 K. High field data reveal the role of weak interdimer coupling. For fields that are large compared to the spin gap, triplet excitations are observed for significantly smaller fields than predicted for isolated dimers, indicating that weak inter-dimer coupling leads to triplet delocalization. High field magnetization behavior at low temperatures suggests additional cooperative effects.

Keywords

spin gap magnetization heat capacity interdimer coupling triplon delocalization

Cite

@article{arxiv.cond-mat/0403334,
  title  = {High Field behavior of the Spin Gap compound Sr$_2$Cu(BO$_3$)$_2$},
  author = {Suchitra E. Sebastian and D. Yin and P. Tanedo and G. A. Jorge and N. Harrison and M. Jaime and Y. Mozharivskyj and G. Miller and J. Krzystek and S. A. Zvyagin and I. R. Fisher},
  journal= {arXiv preprint arXiv:cond-mat/0403334},
  year   = {2011}
}

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4 pages, 6 figures Submitted to PRL

High Field behavior of the Spin Gap compound Sr$_2$Cu(BO$_3$)$_2$

Abstract

Keywords

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