Dzyaloshinski-Moriya Interaction in the 2D Spin Gap System SrCu2(BO3)2

Details Dzyaloshinski-Moriya Interaction in the 2D Spin Gap System SrCu2(BO3)2 Dzyaloshinski-Moriya Interaction in the 2D Spin Gap System SrCu2(BO3)2

2001-06-04

arxiv.org/abs/cond-mat/0106036v3

Phys. Rev. Lett. 87, 167205 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, symmetries clarified, added references, (v3) correct address

Scientific paper

10.1103/PhysRevLett.87.167205

The Dzyaloshinski-Moriya interaction partially lifts the magnetic frustration of the spin-1/2 oxide SrCu2(BO3)2. It explains the fine structure of the excited triplet state and its unusual magnetic field dependence, as observed in previous ESR and new neutron inelastic scattering experiments. We claim that it is mainly responsible for the dispersion. We propose also a new mechanism for the observed ESR transitions forbidden by standard selection rules, that relies on an instantaneous Dzyaloshinski-Moriya interaction induced by spin-phonon couplings.

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