GROUND-STATE REAL-SPACE RENORMALIZATION FOR LINEAR-CHAIN HEISENBERG MODELS WITH ALTERNATION

abstract

• Ground-state energy estimates are made via real-space renormalization for linear-chain Heisenberg models of general site spins. The tendency for bond alternation (i.e., Peierls distortion or dimerization) is studied and is found to be obligatory only for the s = 1 2 model, which is thus placed in a different universality class than the other spins s 1. Variational bounds which become exact either for large s or "strong" alternation are obtained for the ground-state energy. 1991.

authors

• Klein, Douglas

published proceedings

• PHYSICA A

author list (cited authors)

• POSHUSTA, R. D., KLEIN, D. J., & MEKELBURGER, J.

citation count

• 1

complete list of authors

• POSHUSTA, RD||KLEIN, DJ||MEKELBURGER, J

publication date

• January 1991

publisher

• Elsevier  Publisher

published in

• Physica A: Statistical Mechanics and its Applications  Journal

keywords

• 49 Mathematical Sciences
• 4902 Mathematical Physics

Digital Object Identifier (DOI)

• 10.1016/0378-4371(91)90044-D

start page

• 265

end page

• 277

volume

• 170

issue

• 2

URL

• http://dx.doi.org/10.1016/0378-4371(91)90044-d