Far infrared study of the two dimensional dimer spin system SrCu_2(BO_3)_2

T. Room; U. Nagel; E. Lippmaa; H. Kageyama; K. Onizuka; Y. Ueda

doi:10.1103/PhysRevB.61.14342

Far infrared study of the two dimensional dimer spin system SrCu_2(BO_3)_2

Strongly Correlated Electrons 2009-10-31 v3 Superconductivity

Authors: T. Room , U. Nagel , E. Lippmaa , H. Kageyama , K. Onizuka , Y. Ueda

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Abstract

Using far-infrared spectroscopy in magnetic fields up to 12T we have studied a two-dimensional dimer spin gap system SrCu_2(BO_3)_2. We found several infrared active modes in the dimerized state (below 10K) in the frequency range from 3 to 100cm^-1. The measured splitting from the ground state to the excited triplet M_S=0 sublevel is Delta_1=24.2cm^-1 and the other two triplet state sublevels in zero magnetic field are 1.4cm^-1 below and above the M_S=0 sublevel. Another multiplet is at Delta_2=37.6cm^-1 from the ground state. A strong electric dipole active transition polarized in the (ab)-plane is activated in the dimer spin system below 15K at 52cm^-1.

Keywords

atomic spectroscopy

Cite

@article{arxiv.cond-mat/9909284,
  title  = {Far infrared study of the two dimensional dimer spin system SrCu_2(BO_3)_2},
  author = {T. Room and U. Nagel and E. Lippmaa and H. Kageyama and K. Onizuka and Y. Ueda},
  journal= {arXiv preprint arXiv:cond-mat/9909284},
  year   = {2009}
}

Comments

4 pages including 5 figures, submitted to PRB, instrumental arte facts removed

Far infrared study of the two dimensional dimer spin system SrCu_2(BO_3)_2

Abstract

Keywords

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