Finite-temperature lineshapes in gapped quantum spin chains

Details Finite-temperature lineshapes in gapped quantum spin chains Finite-temperature lineshapes in gapped quantum spin chains

2007-11-15

arxiv.org/abs/0711.2524v2

Phys.Rev.B78:100403,2008

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures; new version contains added references

Scientific paper

10.1103/PhysRevB.78.100403

We consider the finite-temperature dynamical structure factor (DSF) of gapped quantum spin chains such as the spin one Heisenberg model and the transverse field Ising model in the disordered phase. At zero temperature the DSF in these models is dominated by a delta-function line arising from the coherent propagation of single particle modes. Using methods of integrable quantum field theory we determine the evolution of the lineshape at low temperatures. We show that the line shape is in general asymmetric in energy and becomes Lorentzian only at temperatures far below the gap. We discuss the relevance of our results for the analysis of inelastic neutron scattering experiments on gapped spin chain systems such as CsNiCl_3 and YBaNiO_5.

Affiliated with

Also associated with

No associations

Rating

Finite-temperature lineshapes in gapped quantum spin chains 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 Finite-temperature lineshapes in gapped quantum spin chains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Finite-temperature lineshapes in gapped quantum spin chains will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-3313