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

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.

arXiv comment4 pages, 4 b&w figures

References in corpus (7)

• Direct Evidence for the Localized Single-Triplet Excitations and the Dispersive Multi-Triplets Excitations in SrCu2(BO3)2
• Dzyaloshinski-Moriya Interaction in the 2D Spin Gap System SrCu2(BO3)2
• ESR study on the excited state energy spectrum of SrCu${}_2$(BO${}_3$)${}_2$ -a central role of multiple-triplet bound states
• X-Band ESR Determination of Dzyaloshinsky-Moriya Interaction in 2D SrCu${}_2$(BO${}_3$)${}_2$ System
• Far infrared study of the two dimensional dimer spin system SrCu_2(BO_3)_2
• Structural Phase Transition in the 2D Spin Dimer Compound SrCu2(BO3)2
• Dynamics, Selection Rules and Dzyaloshinsky-Moriya interactions in Strongly Frustrated Magnets

Cited by in corpus (5)

• The effect of Dzyaloshinskii-Moriya interactions on the phase diagram and magnetic excitations of SrCu2(BO3)2
• Dynamics and Instabilities of the Shastry-Sutherland Model
• Magnon Dispersion and Anisotropies in SrCu${}_2$(BO${}_3$)${}_2$
• Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice
• Spin-polaron excitations in a doped Shastry-Sutherland model