Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/8623
Title: Lineshape of the singlet-triplet excitations in the dimer system Sr 3 Cr 2 O 8 to first order in the high-density 1/z expansion
Authors: Jensen, J
Quintero-Castro, DL
Islam, ATMN
Rule, KC
Månsson, M
Lake, B
Keywords: Experiment planning
Neutrons
Temperature zero K
Exciation functions
Energy
Dimers
Issue Date: 11-Apr-2014
Publisher: Physical Review B
Citation: Jensen, J., Quintero-Castro, D. L., Islam, A., Rule, K. C., Månsson, M., & Lake, B. (2014). Lineshape of the singlet-triplet excitations in the dimer system Sr3Cr2O8 to first order in the high-density 1/z expansion. Physical Review B, 89(13), 134407. doi:10.1103/PhysRevB.89.134407
Abstract: The Cr 5+ ions in Sr 3 Cr 2 O 8 constitute a strongly correlated spin-1/2 dimer system. Experiments show that the collective singlet-triplet excitations in this system are well defined in the zero-temperature limit, but, when heated, the inelastic neutron scattering peaks decrease rapidly in intensity and acquire a nonzero line width. When including the fluctuations to leading order in 1/z , where z is the coordination number, the diagrammatic high-density expansion is found to offer an accurate description of the singlet-triplet excitations. The theory explains not only the temperature dependencies of the intensities and line widths, but also that strong correlation causes the lineshapes to become asymmetric at temperatures comparable to the excitation energies.© 2014, American Physical Society.
Gov't Doc #: 7047
URI: http://dx.doi.org/10.1103/PhysRevB.89.134407
http://apo.ansto.gov.au/dspace/handle/10238/8623
Appears in Collections:Journal Articles

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.