THE OPEN SPIN CHAIN WITH IMPURITY - AN EXACT SOLUTION

Authors
FRAHM H ZVYAGIN AA
Citation
H. Frahm et Aa. Zvyagin, THE OPEN SPIN CHAIN WITH IMPURITY - AN EXACT SOLUTION, Journal of physics. Condensed matter, 9(45), 1997, pp. 9939-9946
Citations number
31
Categorie Soggetti
Physics, Condensed Matter
Journal title
Journal of physics. Condensed matter → ACNP
ISSN journal
09538984
Volume
9
Issue
45
Year of publication
1997
Pages
9939 - 9946
Database
ISI
SICI code
0953-8984(1997)9:45<9939:TOSCWI>2.0.ZU;2-B
Abstract
Using a model of an open spin chain that is exactly soluble by means o f a Bethe ansatz, we study the effects of a boundary magnetic field an d an impurity spin coupled to the chain. An impurity spin only scatter s forward, while the boundary is purely a back-scatterer. Two paramete rs for the impurity and one for the boundary permit us to mimic the ef fect of real magnetic impurity, with both forward and backward scatter ing.