Monte Carlo study of fourspinon dynamic structure function in antiferromagnetic Heisenberg model
Abstract
Using Monte Carlo integration methods, we describe the behaviour of the exact fourspinon dynamic structure function S_{4} in the antiferromagnetic spin \frac{1}{2} Heisenberg quantum spin chain as a function of the neutron energy ohgr and momentum transfer k. We also determine the fourspinon continuum, the extent of the region in the (k, ohgr) plane outside which S_{4} is identically zero. In each case, the behaviour of S_{4} is shown to be consistent with the fourspinon continuum and compared to that of the exact twospinon dynamic structure function S_{2}. Overall shape similarity is noted.
 Publication:

Journal of Physics A Mathematical General
 Pub Date:
 January 2004
 DOI:
 10.1088/03054470/37/2/017
 Bibcode:
 2004JPhA...37..497S
 Keywords:

 Heisenberg spin chain. exact dynamic structure function.