Raman Scattering and Dilatometry of Frustrated Spin Dimer Compound SrCu2(BO3)2 in High Magnetic Fields to 45T

ORAL

Abstract

SrCu2(BO3)2 is a quasi-two dimensional orthogonal spin dimer system with a spin singlet ground state. It is a realization of the Shastry Sutherland model, and exhibits a sequence of magnetization plateaux at magnetic fields in excess of 20 T, i.e. high enough to close the low temperature spin gap [1]. The unique behavior of this quantum spin liquid results from the interplay between geometrical frustration and strong quantum fluctuations. We will discuss the origin and characteristics of the strong spin-lattice coupling in SrCu2(BO3)2, as learned from experimetal studies of Raman scattering, thermal expansion, and magnetostriction performed in high DC magnetic fields to 45T. The interpretation of experimental results is supported by a theoretical analysis and prediction of active Raman modes that include the so-called panthograph mode [2].
[1] M. Jaime, et al. Proc. Natl. Acad. Sci. 109, 12407 (2012).
[2] G. Radtke et al., Proc. Natl. Acad. Sci. 112, 1971 (2015).

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Presenters

  • Marcelo Jaime

    Los Alamos Natl Lab, National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos National Laboratory, National High Magnetic Field Laboratory, NHMFL, LANL

Authors

  • Marcelo Jaime

    Los Alamos Natl Lab, National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos National Laboratory, National High Magnetic Field Laboratory, NHMFL, LANL

  • Komalavalli Thirunavukkuarasu

    Florida A&M Univ, Physics, Florida A&M University, Florida A&M University, Florida A&M Univ.

  • Dmitry Smirnov

    1800 East Paul Dirac Drive, Natl High Magnetic Field Lab, Natl High Magnetic Field Lab, National High Magnetic Field Laboratory, NHMFL, Condensed Matter Science, National High Magnetic Field Laboratory, NHMFL, FSU

  • Zhengguang Lu

    National High Magnetic Field Laboratory, Florida State Universtiy, Physics, Florida State University, Natl High Magnetic Field Lab, NHMFL, FSU

  • Peter Christianen

    HFML, Radboud Univ.

  • Mariana Ballotin

    HFML, Radboud Univ.

  • Hanna Dabkowska

    BIMR, McMaster Univ.

  • Guillaume Radtke

    Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Universités - UPMC Univ Paris 06, UMR CNRS 7590, Muséum National d'Histoire Naturelle,, Université Pierre et Marie Curie

  • Andres Saul

    CINaM-CNRS UMR 7325 Campus de Luminy, Aix-Marseille University, Aix-Marseille University, CINaM/CNRS, Aix-Marseille University, CINaM/CNRS, Aix-Marseille Univ.