Temperature Evolution of the Quantum Gap in CsNiCl3

Details Temperature Evolution of the Quantum Gap in CsNiCl3 Temperature Evolution of the Quantum Gap in CsNiCl3

2000-11-02

arxiv.org/abs/cond-mat/0011041v1

Phys. Rev. B 63, 134417 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

Latex, 3 figures, accepted by Pysical Review B

Scientific paper

10.1103/PhysRevB.63.134417

Neutron 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.

Affiliated with

Also associated with

No associations

Rating

Temperature Evolution of the Quantum Gap in CsNiCl3 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Temperature Evolution of the Quantum Gap in CsNiCl3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature Evolution of the Quantum Gap in CsNiCl3 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-452946