EXACT CALCULATION OF THE GROUND-STATE DYNAMICAL SPIN CORRELATION-FUNCTION OF A S=1 2 ANTIFERROMAGNETIC HEISENBERG CHAIN WITH FREE SPINONS/

Authors
HALDANE FDM ZIRNBAUER MR
Citation
Fdm. Haldane et Mr. Zirnbauer, EXACT CALCULATION OF THE GROUND-STATE DYNAMICAL SPIN CORRELATION-FUNCTION OF A S=1 2 ANTIFERROMAGNETIC HEISENBERG CHAIN WITH FREE SPINONS/, Physical review letters, 71(24), 1993, pp. 4055-4058
Citations number
23
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
24
Year of publication
1993
Pages
4055 - 4058
Database
ISI
SICI code
0031-9007(1993)71:24<4055:ECOTGD>2.0.ZU;2-Q
Abstract
We calculate the exact dynamical magnetic structure factor S(Q, E) in the ground state of a one-dimensional S = 1/2 antiferromagnet with gap less free S = 1/2 spinon excitations, the Haldane-Shastry model with i nverse-square exchange, which is in the same low-energy universality c lass as Bethe's nearest-neighbor exchange model. Only two-spinon excit ed states contribute, and S(Q, E) is found to be a very simple integra l over these states.