Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets
- ORNL
- CEA, Grenoble, France
- Kagoshima University, Kagoshima JAPAN
- National Institute of Standards and Technology (NIST)
Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-onedimensional S = 1/2 gapped quantum magnets CH32CHNH3CuCL3 (IPA-CuCl3, where IPA denotes isopropyl ammonium) and Cu2Cl4 D8C4SO2 (Sul-Cu2Cl4) using inelastic neutron scattering. The results are compared to those found in literature for S = 1 Haldane spin chain materials and to theoretical calculations for the O3- and ON- quantum nonlinear-models. It is found that when the T = 0 energy gap is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasiuniversality extends over a surprising broad T range, at least up to kT ~ 1.5.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 979139
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 15; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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