Lattice dynamics of the Heisenberg chain coupled to finite frequency bond phonons

Details Lattice dynamics of the Heisenberg chain coupled to finite frequency bond phonons Lattice dynamics of the Heisenberg chain coupled to finite frequency bond phonons

2007-05-07

arxiv.org/abs/0705.0799v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 6 figures

Scientific paper

The phonon dynamics in a one dimensional Heisenberg spin chain coupled to finite-frequency bond phonons is studied. We present the first detailed phonon spectra for these systems using Quantum Monte Carlo. The quantum phase transition is dominated by a central peak, yet the renormalisation of the main phonon branch depends strongly on the bare phonon frequency omega_0. The main branch remains largely unaffected at omega_0 \gsim J, but it softens completely when omega_0 is low enough. This is an unusual scenario for a structural phase transition and was observable only on sufficiently large systems. Approaching the dimerized phase from finite temperature, the lattice dynamics mirrors the behavior of a three dimensional system. For the efficient measurement of Greens functions, we introduce a mapping from the stochastic series expansion to continuous imaginary time.

Affiliated with

Also associated with

No associations

Rating

Lattice dynamics of the Heisenberg chain coupled to finite frequency bond phonons 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 Lattice dynamics of the Heisenberg chain coupled to finite frequency bond phonons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lattice dynamics of the Heisenberg chain coupled to finite frequency bond phonons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-597973