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Neutron scattering from the static and dynamic lattice of SrCu 2(BO 3) 2 in its Shastry-Sutherland singlet ground state

Publication ,  Journal Article
Haravifard, S; Gaulin, BD; Yamani, Z; Dunsiger, SR; Dabkowska, HA
Published in: Physical Review B - Condensed Matter and Materials Physics
April 12, 2012

Elastic and inelastic neutron scattering results show that SrCu 2(BO 3) 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 SrCu 2(BO 3) 2 at low temperatures. © 2012 American Physical Society.

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Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

April 12, 2012

Volume

85

Issue

13

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Haravifard, S., Gaulin, B. D., Yamani, Z., Dunsiger, S. R., & Dabkowska, H. A. (2012). Neutron scattering from the static and dynamic lattice of SrCu 2(BO 3) 2 in its Shastry-Sutherland singlet ground state. Physical Review B - Condensed Matter and Materials Physics, 85(13). https://doi.org/10.1103/PhysRevB.85.134104
Haravifard, S., B. D. Gaulin, Z. Yamani, S. R. Dunsiger, and H. A. Dabkowska. “Neutron scattering from the static and dynamic lattice of SrCu 2(BO 3) 2 in its Shastry-Sutherland singlet ground state.” Physical Review B - Condensed Matter and Materials Physics 85, no. 13 (April 12, 2012). https://doi.org/10.1103/PhysRevB.85.134104.
Haravifard S, Gaulin BD, Yamani Z, Dunsiger SR, Dabkowska HA. Neutron scattering from the static and dynamic lattice of SrCu 2(BO 3) 2 in its Shastry-Sutherland singlet ground state. Physical Review B - Condensed Matter and Materials Physics. 2012 Apr 12;85(13).
Haravifard, S., et al. “Neutron scattering from the static and dynamic lattice of SrCu 2(BO 3) 2 in its Shastry-Sutherland singlet ground state.” Physical Review B - Condensed Matter and Materials Physics, vol. 85, no. 13, Apr. 2012. Scopus, doi:10.1103/PhysRevB.85.134104.
Haravifard S, Gaulin BD, Yamani Z, Dunsiger SR, Dabkowska HA. Neutron scattering from the static and dynamic lattice of SrCu 2(BO 3) 2 in its Shastry-Sutherland singlet ground state. Physical Review B - Condensed Matter and Materials Physics. 2012 Apr 12;85(13).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

April 12, 2012

Volume

85

Issue

13

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences