Neutron scattering from the static and dynamic lattice of SrCu2(BO3)2 in its Shastry-Sutherland

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.85.134104
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TypeArticle
Journal titlePhysical Review B
Volume85
Issue13
Pages134104-1134104-7
AbstractElastic and inelastic neutron scattering results show that SrCu₂(BO₃)₂ enters its low-temperature singlet ground state below 10 K without an obvious accompanying structural phase transition, despite suggestions emanating from earlier heat capacity measurements. However, evidence for significant spin-phonon coupling is found in the energy widths, and the corresponding lifetimes, of transverse acoustic phonons propagating in the (H00) direction of the Shastry-Sutherland, tetragonal basal plane. Transverse acoustic phonons with energies comparable to and higher than the onset of the two-triplet continuum show substantially increased lifetimes on entering the singlet ground state below ∼10 K. This is qualitatively consistent with the removal of a decay channel for the phonons due to the gapping of the spin excitation spectrum in SrCu₂(BO₃)₂ at low temperatures.
Publication date
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number20140147
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Record identifierb476f0e0-4c87-4779-a3f2-775e9c101150
Record created2012-06-14
Record modified2016-05-09
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