Temperature Evolution of the Quantum Gap in CsNiCl3

Download
  1. Get@NRC: Temperature Evolution of the Quantum Gap in CsNiCl3 (Opens in a new window)
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titlecond-mat/0011041
SubjectCondensed Matter - Strongly Correlated Electrons
AbstractNeutron scattering measurements on the one-dimensional gapped S=1 antiferromagnet, CsNiCl3, have shown that the excitation corresponding to the Haldane mass gap Delta at low temperatures persists as a resonant feature to high temperatures. We find that the strong upward renormalisation of the gap excitation, by a factor of three between 5 and 70K, is more than enough to overcome its decreasing lifetime. We find that the gap lifetime is substantially shorter than that predicted by the scaling theory of Damle and Sachdev in its low temperature range of validity. The upward gap renormalisation agrees with the non-linear sigma model at low temperatures and even up to T of order 2Delta provided an upper mass cutoff is included.
Publication date
Linkhttp://arxiv.org/abs/cond-mat/0011041
AffiliationNational Research Council Canada; NRC Canadian Neutron Beam Centre
Peer reviewedNo
NPARC number12327372
Export citationExport as RIS
Report a correctionReport a correction
Record identifierc19ae402-6783-4da8-9e92-34cf6c8a89bb
Record created2009-09-10
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)