Electron Spin Resonance of SrCu2(BO3)2 at High Magnetic Field

S. El Shawish; J. Bonca; C. D. Batista; I. sega

doi:10.1103/PhysRevB.71.014413

Electron Spin Resonance of SrCu2(BO3)2 at High Magnetic Field

Other Condensed Matter 2009-11-10 v1 Statistical Mechanics

Authors: S. El Shawish , J. Bonca , C. D. Batista , I. sega

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Abstract

We calculate the electron spin resonance (ESR) spectra of the quasi-two-dimensional dimer spin liquid SrCu2(BO3)2 as a function of magnetic field B. Using the standard Lanczos method, we solve a Shastry-Sutherland Hamiltonian with additional Dzyaloshinsky-Moriya (DM) terms which are crucial to explain different qualitative aspects of the ESR spectra. In particular, a nearest-neighbor DM interaction with a non-zero D_z component is required to explain the low frequency ESR lines for B || c. This suggests that crystal symmetry is lowered at low temperatures due to a structural phase transition.

Keywords

electron spin resonance SrCu2(BO3)2 Shastry-Sutherland Hamiltonian Dzyaloshinskii-Moriya quantum magnetism

Cite

@article{arxiv.cond-mat/0407632,
  title  = {Electron Spin Resonance of SrCu2(BO3)2 at High Magnetic Field},
  author = {S. El Shawish and J. Bonca and C. D. Batista and I. sega},
  journal= {arXiv preprint arXiv:cond-mat/0407632},
  year   = {2009}
}

Comments

4 pages, 4 b&w figures

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